🛡️Information Security: Distributed Denial of Service [DDoS] (Definitions)

"An electronic attack perpetrated by a person who controls legions of hijacked computers. On a single command, the computers simultaneously send packets of data across the Internet at a target computer. The attack is designed to overwhelm the target and stop it from functioning." (Andy Walker, "Absolute Beginner’s Guide To: Security, Spam, Spyware & Viruses", 2005)

"A type of DoS attack in which many (usually thousands or millions) of systems flood the victim with unwanted traffic. Typically perpetrated by networks of zombie Trojans that are woken up specifically for the attack." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"A denial of service (DoS) attack that comes from multiple sources at the same time. Attackers often enlist computers into botnets after infecting them with malware. Once infected, the attacker can then direct the infected computers to attack other computers." (Darril Gibson, "Effective Help Desk Specialist Skills", 2014)

"A denial of service technique using numerous hosts to perform the attack. For example, in a network flooding attack, a large number of co-opted computers (e.g., a botnet) send a large volume of spurious network packets to disable a specified target system. See also denial of service; botnet." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"A DoS attack in which multiple systems are used to flood servers with traffic in an attempt to overwhelm available resources (transmission capacity, memory, processing power, and so on), making them unavailable to respond to legitimate users." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

"DDoS stands for distributed denial of service. In this type of an attack, an attacker tends to overwhelm the targeted network in order to make the services unavailable to the intended or legitimate user." (Kirti R Bhatele et al, "The Role of Artificial Intelligence in Cyber Security", Countering Cyber Attacks and Preserving the Integrity and Availability of Critical Systems, 2019)

"In DDoS attack, the incoming network traffic affects a target (e.g., server) from many different compromised sources. Consequently, online services are unavailable due to the attack. The target's resources are affected with different malicious network-based techniques (e.g., flood of network traffic packets)." (Ana Gavrovska & Andreja Samčović, "Intelligent Automation Using Machine and Deep Learning in Cybersecurity of Industrial IoT", 2020)

"This refers to malicious attacks or threats on computer systems to disrupt or break computing activities so that their access and availability is denied to the consumers of such systems or activities." (Heru Susanto et al, "Data Security for Connected Governments and Organisations: Managing Automation and Artificial Intelligence", 2021)

"A denial of service technique that uses numerous hosts to perform the attack." (CNSSI 4009-2015)

"A distributed denial-of-service (DDoS) attack is a malicious attempt to disrupt normal traffic on a targeted server, service or network by overwhelming the target or its surrounding infrastructure with a flood of Internet traffic." (proofpoint) [source]

🛡️Information Security: Privacy (Definitions)

"Privacy is concerned with the appropriate use of personal data based on regulation and the explicit consent of the party." (Martin Oberhofer et al, "Enterprise Master Data Management", 2008)

"Proper handling and use of personal information (PI) throughout its life cycle, consistent with data-protection principles and the preferences of the subject." (Alex Berson & Lawrence Dubov, "Master Data Management and Data Governance", 2010)

"Control of data usage dealing with the rights of individuals and organizations to determine the “who, what, when, where, and how” of data access." (Carlos Coronel et al, "Database Systems: Design, Implementation, and Management" 9th Ed, 2011)

"Keeping information as a secret, known only to the originators of that information. This contrasts with confidentiality, in which information is shared among a select group of recipients. See also confidentiality." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"Control of data usage dealing with the rights of individuals and organizations to determine the “who, what, when, where, and how” of data access." (Carlos Coronel & Steven Morris, "Database Systems: Design, Implementation, & Management" 11th  Ed.", 2014)

"The ability of a person to keep personal information to himself or herself." (Jason Williamson, "Getting a Big Data Job For Dummies", 2015)

"The protection of individual rights to nondisclosure." (Mike Harwood, "Internet Security: How to Defend Against Attackers on the Web" 2nd Ed., 2015)

"The right of individuals to control or influence what information related to them may be collected and stored and by whom, as well as to whom that information may be disclosed." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

 "The right of individuals to a private life includes a right not to have personal information about themselves made public. A right to privacy is recognised by the Universal Declaration of Human Rights and the European Convention on Human Rights. See data protection legislation." (Open Data Handbook)

"to seclude certain data /information about oneself that is deemed personal." (Analytics Insight)

🛡️Information Security: Denial of Service [DoS] (Definitions)

"A type of attack on a computer system that ties up critical system resources, making the system temporarily unusable." (Tom Petrocelli, "Data Protection and Information Lifecycle Management", 2005)

"Any attack that affects the availability of a service. Reliability bugs that cause a service to crash or hang are usually potential denial-of-service problems." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"This is a technique for overloading an IT system with a malicious workload, effectively preventing its regular service use." (Martin Oberhofer et al, "The Art of Enterprise Information Architecture", 2010)

"Occurs when a server or Web site receives a flood of traffic - much more traffic or requests for service than it can handle, causing it to crash." (Linda Volonino & Efraim Turban, "Information Technology for Management 8th Ed", 2011)

"Causing an information resource to be partially or completely unable to process requests. This is usually accomplished by flooding the resource with more requests than it can handle, thereby rendering it incapable of providing normal levels of service." (Mark Rhodes-Ousley, "Information Security: The Complete Reference, Second Edition" 2nd Ed., 2013)

"Attacks designed to disable a resource such as a server, network, or any other service provided by the company. If the attack is successful, the resource is no longer available to legitimate users." (Darril Gibson, "Effective Help Desk Specialist Skills", 2014)

"An attack from a single attacker designed to disrupt or disable the services provided by an IT system. Compare to distributed denial of service (DDoS)." (Darril Gibson, "Effective Help Desk Specialist Skills", 2014)

"A coordinated attack in which the target website or service is flooded with requests for access, to the point that it is completely overwhelmed." (Faithe Wempen, "Computing Fundamentals: Introduction to Computers", 2015)

"An attack that can result in decreased availability of the targeted system." (Mike Harwood, "Internet Security: How to Defend Against Attackers on the Web" 2nd Ed., 2015)

"An attack that generally floods a network with traffic. A successful DoS attack renders the network unusable and effectively stops the victim organization’s ability to conduct business." (Weiss, "Auditing IT Infrastructures for Compliance" 2nd Ed., 2015)

"A type of cyberattack to degrade the availability of a target system." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"Any action, or series of actions, that prevents a system, or its resources, from functioning in accordance with its intended purpose." (Shon Harris & Fernando Maymi, "CISSP All-in-One Exam Guide" 8th Ed., 2018)

"The prevention of authorized access to resources or the delaying of time-critical operations." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

"An attack shutting down running of a service or network in order to render it inaccessible to its users (whether human person or a processing device)." (Wissam Abbass et al, "Internet of Things Application for Intelligent Cities: Security Risk Assessment Challenges", 2021)

"Actions that prevent the NE from functioning in accordance with its intended purpose. A piece of equipment or entity may be rendered inoperable or forced to operate in a degraded state; operations that depend on timeliness may be delayed." (NIST SP 800-13)

"The prevention of authorized access to resources or the delaying of time-critical operations. (Time-critical may be milliseconds or it may be hours, depending upon the service provided)." (NIST SP 800-12 Rev. 1)

"The prevention of authorized access to a system resource or the delaying of system operations and functions." (NIST SP 800-82 Rev. 2)

🛡️Information Security: Cybersecurity (Definitions)

 "The art of ensuring the existence and continuity of the Information Society of a nation, guaranteeing and protecting, in Cyberspace, its information assets and critical infrastructure." (Claudia Canongia & Raphael Mandarino, "Cybersecurity: The New Challenge of the Information Society", 2012)

"The act of protecting technology, information, and networks from attacks." (Jason Williamson, "Getting a Big Data Job For Dummies", 2015)

"The practice of protecting computers and electronic communication systems as well as the associated information." (Weiss, "Auditing IT Infrastructures for Compliance" 2nd Ed., 2015)

"Cybersecurity deals with damage to, unauthorized use of, exploitation of electronic information and communications systems that ensure confidentiality, integrity and availability." (Sanjukta Pookulangara, "Cybersecurity: What Matters to Consumers - An Exploratory Study", 2016)

"Focuses on protecting computers, networks, programs and data from unintended or unauthorized access, change or destruction." (Kimberly Lukin, "Russian Cyberwarfare Taxonomy and Cybersecurity Contradictions between Russia and EU", 2016)

"The activity or process, ability or capability, or state whereby information and communications systems and the information contained therein are protected from and/or defended against damage, unauthorized use or modification, or exploitation." (Olivera Injac & Ramo Šendelj, "National Security Policy and Strategy and Cyber Security Risks", 2016)

"The ability to protect against the unauthorized use of electronic data and malicious activity. This electronic data can be personal customer information such as names, addresses, social security numbers, credit cards, and debit cards, to name a few." (Brittany Bullard, "Style and Statistics", 2016)

"A trustworthiness property concerned with the protection of systems from cyberattacks." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"Information security (infosec) but broadly referring to technology and human systems that are built around the secure exchange, storage, and management of information." (Shalin Hai-Jew, "Safe Distances: Online and RL Hyper-Personal Relationships as Potential Attack Surfaces", 2018)

"Is defined as the collection of tools, policies, security concepts, security safeguards, guidelines, risk management approaches, actions, training, best practices, assurance and technologies that can be used to protect the cyber environment, organization, and user assets." (Thokozani I Nzimakwe, "Government's Dynamic Approach to Addressing Challenges of Cybersecurity in South Africa", 2018)

"Protection against criminal access to one’s data and information and against criminal manipulation of computer networks/data/systems." (Shalin Hai-Jew, "Beware!: A Multimodal Analysis of Cautionary Tales in Strategic Cybersecurity Messaging Online", 2018)

"The collection of tools, policies, security concepts, security safeguards, guidelines, risk management approaches, actions, training, best practices, assurance, and technologies that can be used to protect the cyberspace environment and organization and users’ assets." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

"The organization and collection of resources, processes, and structures used to protect cyberspace from occurrences that misalign de jure from de facto property rights." (Mika Westerlund et al, "A Three-Vector Approach to Blind Spots in Cybersecurity", 2018)

"A computing-based discipline involving technology, people, information, and processes to enable assured operations. It involves the creation, operation, analysis, and testing of secure computer systems. It is an interdisciplinary course of study, including aspects of law, policy, human factors, ethics, and risk management in the context of adversaries." (Matt Bishop et al, "Cybersecurity Curricular Guidelines", 2019)

"Acts taken, technologies created and deployed, policies written and enacted, to protect computer systems and networks against misuse, intrusion, and exploitation." (Shalin Hai-Jew, "The Electronic Hive Mind and Cybersecurity: Mass-Scale Human Cognitive Limits to Explain the “Weakest Link” in Cybersecurity", 2019)

"Also known as computer security or IT security, is the protection of computer systems from the theft or damage to the hardware, software or the information on them, as well as from disruption or misdirection of the services they provide." (Soraya Sedkaoui, "Big Data Analytics for Entrepreneurial Success", 2019)

"Includes process, procedures, technologies, and controls designed to protect systems, networks, and data." (Sandra Blanke et al, "How Can a Cybersecurity Student Become a Cybersecurity Professional and Succeed in a Cybersecurity Career?", 2019)

"The protection of computer systems from theft and damage to their assets and from manipulation and distraction of their services." (Viacheslav Izosimov & Martin Törngren, "Security Awareness in the Internet of Everything", 2019)

"The protection of internet-connected systems including hardware, software, and data from cyberattacks."  (Semra Birgün & Zeynep Altan, "A Managerial Perspective for the Software Development Process: Achieving Software Product Quality by the Theory of Constraints", 2019)

"Cybersecurity is seen where security alerts and cyber-attacks are becoming more frequent and malicious, these threats include private access attempts and exploitation software or phishing, malware, web application attacks, and network penetration." (Theunis G Pelser & Garth Gaffley, "Implications of Digital Transformation on the Strategy Development Process for Business Leaders", 2020)

"Is the protection of internet-connected systems, including hardware, software and data, from cyberattacks. In a computing context, security comprises cybersecurity and physical security - both are used by enterprises to protect against unauthorized access to data centers and other computerized systems." (Alexander A Filatov, "Sovereign Bureaucrats vs. Global Tech Companies: Ethical and Regulatory Challenges", 2020)

"It is a general term which describes technologies, processes, methods, and practices for the purpose of protection of internet-connected information systems from attacks, i.e., cyberattacks. Cybersecurity can refer to security of data, software or hardware within information systems." (Ana Gavrovska & Andreja Samčović, "Intelligent Automation Using Machine and Deep Learning in Cybersecurity of Industrial IoT: CCTV Security and DDoS Attack Detection", 2020)

"Cybersecurity is an act to protect data, devices, applications, servers, network from the malicious attack through various tools and techniques. The process also ensures the confidentiality, integrity, availability, and non-repudiation of the content." (Shafali Agarwal, "Preserving Information Security Using Fractal-Based Cryptosystem", 2021)

"Cybersecurity refers to the set of technologies, processes, and practices designed to safeguard networks, devices, programs, and data from attack, threats, or unauthorized access." (Sanjeev Rao et al, "Online Social Networks Misuse, Cyber Crimes, and Counter Mechanisms", 2021)

"It is the organization and collection of resources, processes, and structures used to protect cyberspace from security events." (Carlos A M S Teles et al, "A Black-Box Framework for Malicious Traffic Detection in ICT Environments", Handbook of Research on Cyber Crime and Information Privacy, 2021)

"Prevention of damage to, protection of, and restoration of computers, electronic communications systems, electronic communications services, wire communication, and electronic communication, including information contained therein, to ensure its availability, integrity, authentication, confidentiality, and nonrepudiation." (CNSSI 4009-2015)

"The ability to protect or defend the use of cyberspace from cyber attacks." (NISTIR 8170)

"The prevention of damage to, unauthorized use of, exploitation of, and - if needed - the restoration of electronic information and communications systems, and the information they contain, in order to strengthen the confidentiality, integrity and availability of these systems." (NISTIR 8074 Vol. 2)

"The process of protecting information by preventing, detecting, and responding to attacks." (NISTIR 8183)

🛡️Information Security: Attack Surface (Definitions)

"The attack surface of a software environment is the code within a computer system that can be run by unauthenticated users. This includes, but is not limited to, user input fields, protocols, interfaces, and services." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"The total vulnerabilities of a system that can be exploited by an attacker." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"Components available to be used by an attacker against the product itself." (Adam Gordon, "Official (ISC)2 Guide to the CISSP CBK" 4th Ed., 2015)

"The avenues of attack that are available to an attacker by virtue of those avenues being exposed in some manner." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"The reachable and exploitable vulnerabilities in a system." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

 "The sum of all externally addressable vulnerabilities within an environment or system." (Forrester)

🛡️Information Security: Attack (Definitions)

[active attack:] "Any network-based attack other than simple eavesdropping (i.e., a passive attack)." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"Unauthorized activity with malicious intent that uses specially crafted code or techniques." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"An attempt to destroy, expose, alter, disable, steal or gain unauthorised access to or make unauthorised use of an asset," (David Sutton, "Information Risk Management: A practitioner’s guide", 2014)

[active attack:] "Attack where the attacker does interact with processing or communication activities." (Adam Gordon, "Official (ISC)2 Guide to the CISSP CBK" 4th Ed., 2015)

[passive attack:] "Attack where the attacker does not interact with processing or communication activities, but only carries out observation and data collection, as in network sniffing." (Adam Gordon, "Official (ISC)2 Guide to the CISSP CBK" 4th Ed., 2015)

"An attempt to gain unauthorized access to system services, resources, or information, or an attempt to compromise system integrity." (Olivera Injac & Ramo Šendelj, "National Security Policy and Strategy and Cyber Security Risks", 2016)

"A sequence of actions intended to have a specified effect favorable to an actor that is adversarial to the owners of that system." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"An attempt to bypass security controls in a system with the mission of using that system or compromising it. An attack is usually accomplished by exploiting a current vulnerability." (Shon Harris & Fernando Maymi, "CISSP All-in-One Exam Guide" 8th Ed., 2018)

"Any kind of malicious activity that attempts to collect, disrupt, deny, degrade, or destroy information system resources or information itself." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

"an aggressive action against a person, an organisation or an asset intended to cause damage or loss." (ISO/IEC 27000:2014)

🛡️Information Security: Digital Signature (Definitions)

"A form of electronic authentication of a digital document. Digital signatures are created and verified using public key cryptography and serve to tie the document being signed to the signer." (J P Getty Trust, "Introduction to Metadata" 2nd Ed., 2008)

"Data which proves that a document, message, or other piece of data was not modified since being processed and sent from a particular party." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"cryptographic transformations of data that allow a recipient of the data to prove the source (non-repudiation) and integrity of the data." (Manish Agrawal, "Information Security and IT Risk Management", 2014)

"Data that is appended to a message, made from the message itself and the sender’s private key, to ensure the authenticity of the message" (Nell Dale & John Lewis, "Computer Science Illuminated" 6th Ed., 2015)

"Ensuring the authenticity and integrity of a message through the use of hashing algorithms and asymmetric algorithms. The message digest is encrypted with the sender’s private key." (Adam Gordon, "Official (ISC)2 Guide to the CISSP CBK" 4th Ed., 2015)

"A means of authenticating that a message or data came from a particular source with a known system identity." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"An electronic signature based upon cryptographic methods of originator authentication, computed by using a set of rules and a set of parameters such that the identity of the signer and the integrity of the data can be verified." (Shon Harris & Fernando Maymi, "CISSP All-in-One Exam Guide, 8th Ed", 2018)

"An encrypted means of identification that cannot be forged and that enables clients to validate servers and vice versa." (Microfocus)

"The combination of the private key, public key, message and hashing generates a digital signature. A digital signature is unique for every transaction and is a way to prove that the originator of the message has access to the private key." (AICPA)

🛡️Information Security: Cyberattack (Definitions)

"Act or effect of an offensive activity cybernetic." (Claudia Canongia & Raphael Mandarino, "Cybersecurity: The New Challenge of the Information Society", 2012)

"Attacks on an organization’s IT resources through cyberspace. The purpose of the attacks might be for monetary gain, intelligence gathering, or vandalism." (Darril Gibson, "Effective Help Desk Specialist Skills", 2014)

"A cyberattack is a deliberate attack on computer systems, a website, or individual computers using a computer. A cyberattack compromises the integrity and/or availability of the computer/system on which the information is stored." (Sanjukta Pookulangara, "Cybersecurity: What Matters to Consumers - An Exploratory Study", 2016)

"Any type of offensive maneuver employed by individuals or whole organizations that targets computer information systems, infrastructures, computer networks, and/or personal computer devices by various means of malicious acts usually originating from an anonymous source that either steals, alters, or destroys a specified target by hacking into a susceptible system." (Kimberly Lukin, "Russian Cyberwarfare Taxonomy and Cybersecurity Contradictions between Russia and EU", 2016)

"When electronic data is used without authorization or malicious activities occur, such as spyware and viruses." (Brittany Bullard, "Style and Statistics", 2016)

"A deliberate exploitation of computer systems, technology-dependent enterprises and networks." (Mika Westerlund et al, "A Three-Vector Approach to Blind Spots in Cybersecurity", 2018)

"Is a deliberate exploitation of computer systems, technology systems, and networks. Cyberattacks use malicious code to alter computer code, logic or data, resulting in disruptive results that can compromise data. It is an illegal attempt to harm someone’s computer system or the information on it, using the internet." (Thokozani I Nzimakwe, "Government's Dynamic Approach to Addressing Challenges of Cybersecurity in South Africa", 2018)

"The state of being protected against the criminal or unauthorized use of electronic data, or the measures taken to achieve this." (Christopher T Anglim, "Cybersecurity Legislation", 2020)

🛡️Information Security: Brute-Force Attack (Definitions)

"A brute force attack attempts to defeat a cryptographic algorithm by trying a large number of possibilities. A brute force attack on a cipher might include trying a large number of keys in the key space to decrypt a message. Brute force attack is the most inefficient method of attacking a cipher, and most cryptanalysis is concerned with finding more efficient means of defeating ciphers." (Michael Coles & Rodney Landrum, , "Expert SQL Server 2008 Encryption", 2008)

"An attack on an encryption algorithm in which the encryption key for ciphertext is determined by trying to decrypt with every key until valid plaintext is obtained." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"A method used for breaking encryption systems. Brute-force methodology entails trying all the possible keys until the proper one is found." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"A method by which a hacker tries to gain access to an account on the target system by trying to “guess” the correct password." ( Manish Agrawal, "Information Security and IT Risk Management", 2014)

"Involves programs designed to guess at every possible combination until the password or key is cracked." (Mike Harwood, "Internet Security: How to Defend Against Attackers on the Web 2nd Ed.", 2015)

"An attack that continually tries different inputs to achieve a predefined goal, which can be used to obtain credentials for unauthorized access." (Shon Harris & Fernando Maymi, "CISSP All-in-One Exam Guide" 8th Ed, 2018)

🛡️Information Security: Cybercrime (Definitions)

 "A variety of offenses related to information technology, including extortion, boiler-room investment and gambling fraud, and fraudulent transfers of funds." (Robert McCrie, "Security Operations Management" 2nd Ed., 2006)

"Any type of crime that targets computers, or uses computer networks or devices, and violates existing laws. Cybercrime includes cyber vandalism, cyber theft, and cyber-attacks." (Darril Gibson, "Effective Help Desk Specialist Skills", 2014)

"Any crime that is facilitated through the use of computers and networks. This can include crimes that are dependent on computers or networks in order to take place, as well as those whose impact and reach are increased by their use." (Hamid R Arabnia et al, "Application of Big Data for National Security", 2015)

"Cybercrime is defined as any illegal activity that uses a computer either as the object of the crime OR as a tool to commit an offense." (Sanjukta Pookulangara, "Cybersecurity: What Matters to Consumers - An Exploratory Study", 2016)

"Any crime that is facilitated or committed using a computer, network, or hardware device." (Anisha B D Gani & Yudi Fernando, "Concept and Practices of Cyber Supply Chain in Manufacturing Context", 2018)

"Is all illegal acts, the commission of which involves the use of information and communication technologies. It is generally thought of as any criminal activity involving a computer system."  (Thokozani I Nzimakwe, "Government's Dynamic Approach to Addressing Challenges of Cybersecurity in South Africa", 2018)

"Any criminal action perpetrated primarily through the use of a computer." (Christopher T Anglim, "Cybersecurity Legislation", 2020)

"Criminal activity involving computer systems, networks, and/or the internet." (Boaventura DaCosta & Soonhwa Seok, "Cybercrime in Online Gaming", 2020)

🛡️Information Security: Access Control Lists (Definitions)

"In Windows-based systems, a list of access control entries (ACE) that apply to an entire object, a set of the object's properties, or an individual property of an object, and that define the access granted to one or more security principals." (Microsoft, "SQL Server 2012 Glossary", 2012)

"An electronic list that specifies who can do what with an object. For example, an ACL on a file specifies who can read, write, execute, delete, and otherwise manipulate the file." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"a list of permissions attached to specified objects. Often abbreviated as ACL." ( Manish Agrawal, "Information Security and IT Risk Management", 2014)

"In systems such as electronic records management, electronic document and records management systems, or document management systems, a list of individuals authorized to access, view, amend, transfer, or delete documents, records, or files. Access rights are enforced through software controls." (Robert F Smallwood, "Information Governance: Concepts, Strategies, and Best Practices", 2014)

"A list of credentials attached to a resource that indicates who has authorized access to that resource." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"A data structure that enumerates the access rights for all active entities (e.g., users) within a system." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"A list of subjects that are authorized to access a particular object. Typically, the types of access are read, write, execute, append, modify, delete, and create." (Shon Harris & Fernando Maymi, "CISSP All-in-One Exam Guide, 8th Ed", 2018)

"Lists of permissions that define which users or groups can access an object." (Weiss, "Auditing IT Infrastructures for Compliance, 2nd Ed", 2015)

🛡️Information Security: Attack Surface (Definitions)

"The attack surface of a software environment is the code within a computer system that can be run by unauthenticated users. This includes, but is not limited to, user input fields, protocols, interfaces, and services." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"The total vulnerabilities of a system that can be exploited by an attacker." (Mark Rhodes-Ousley, "Information Security: The Complete Reference" 2nd Ed., 2013)

"Components available to be used by an attacker against the product itself." (Adam Gordon, "Official (ISC)2 Guide to the CISSP CBK" 4th Ed., 2015)

"The avenues of attack that are available to an attacker by virtue of those avenues being exposed in some manner." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"The reachable and exploitable vulnerabilities in a system." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

 "The totality of different attack vectors through which cyber compromises may occur." (Shalin Hai-Jew, "Safe Distances: Online and RL Hyper-Personal Relationships as Potential Attack Surfaces", 2018)

"The sum of all externally addressable vulnerabilities within an environment or system." (Forrester)

🛡️Information Security: SQL Injection Attack (Definitions)

"This is a way that hackers can bring a database down. SQL injection attacks can be avoided by using stored procedures with the appropriate configured parameters." (Joseph L Jorden & Dandy Weyn, "MCTS Microsoft SQL Server 2005: Implementation and Maintenance Study Guide - Exam 70-431", 2006)

"An attack on a database made by inserting escape characters or additional commands into a batch, allowing the attacker to run commands on the database server. This exploits poor validation or weak designs in application code that allow extra commands to be submitted to the server." (Marilyn Miller-White et al, "MCITP Administrator: Microsoft® SQL Server™ 2005 Optimization and Maintenance 70-444", 2007)

"An Internet attack against a database accessible via a web page. Automated programs are available to launch attacks, and successful SQL injection attacks can obtain the entire layout of a database and all the data." (Darril Gibson, "MCITP SQL Server 2005 Database Developer All-in-One Exam Guide", 2008)

"An attack against a database system launched through an application program containing embedded SQL." (Jan L Harrington, "Relational Database Design and Implementation: Clearly explained" 3rd Ed., 2009)

"A type of attack designed to break through database security and access the information. A SQL injection attack “injects” or manipulates SQL code." (Mike Harwood, "Internet Security: How to Defend Against Attackers on the Web 2nd Ed.", 2015)

🛡️Information Security: Cryptanalysis (Definitions)

"Cryptanalysis is the science of analyzing cryptographic methods and algorithms, generally probing them for weaknesses. Cryptanalysts devise new methods of defeating cryptographic algorithms." (Michael Coles & Rodney Landrum, , "Expert SQL Server 2008 Encryption", 2008)

"The science (or art) of breaking cryptographic algorithms." (Mark S Merkow & Lakshmikanth Raghavan, "Secure and Resilient Software Development", 2010)

"The study of mathematical techniques designed to defeat cryptographic techniques. Collectively, a branch of science that deals with cryptography and cryptanalysis is called cryptology. " (Alex Berson & Lawrence Dubov, "Master Data Management and Data Governance", 2010)

"The art of breaking ciphertext." (Manish Agrawal, "Information Security and IT Risk Management", 2014)

"Practice of uncovering flaws within cryptosystems." (Adam Gordon, "Official (ISC)2 Guide to the CISSP CBK" 4th Ed., 2015)

"The process of decrypting a message without knowing the cipher or key used to encrypt it" (Nell Dale & John Lewis, "Computer Science Illuminated" 6th Ed., 2015)

"The practice of breaking cryptosystems and algorithms used in encryption and decryption processes." (Shon Harris & Fernando Maymi, "CISSP All-in-One Exam Guide" 8th Ed., 2018)

"The process of breaking encryption without the benefit of the key under which data was encrypted." (O Sami Saydjari, "Engineering Trustworthy Systems: Get Cybersecurity Design Right the First Time", 2018)

"Cryptanalysis refers to the study of the cryptosystem or ciphertext to crack the confidentiality of the underlying information and try to gain unauthorized access to the content." (Shafali Agarwal, "Preserving Information Security Using Fractal-Based Cryptosystem", Handbook of Research on Cyber Crime and Information Privacy, 2021)

🛡️Information Security: Advanced Persistent Threat [APT] (Definitions)

"A sustained, human-intensive attack that leverages the full range of computer intrusion techniques." (Manish Agrawal, "Information Security and IT Risk Management", 2014)

"A group or entity that has the capability and intent to persistently target a specific organization. They typically have the backing of an organization with almost unlimited resources, such as a government." (Darril Gibson, "Effective Help Desk Specialist Skills", 2014)

"A network attack in which an unauthorized person gains access to a network and stays there undetected for a long period of time. The intention of an APT attack is to steal data rather than to cause damage to the network or organization. APT attacks target organizations in sectors with high-value information, such as national defense, manufacturing, and the financial industry. APTs differ from other types of attack in their careful target selection and persistent, often stealthy, intrusion efforts over extended periods." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

"Sophisticated attacks that are carefully crafted by hostile governments or organizations, usually for political vengeance or financial gain. They often combine the most advanced malware, spear-phishing, and intrusion techniques available." (Mark Rhodes-Ousley, "Information Security: The Complete Reference, Second Edition" 2nd Ed., 2013)

"An adversary that possesses sophisticated levels of expertise and significant resources which allow it to create opportunities to achieve its objectives using multiple attack vectors." (NIST SP800-61)

"An adversary with sophisticated levels of expertise and significant resources, allowing it through the use of multiple different attack vectors (e.g., cyber, physical, and deception) to generate opportunities to achieve its objectives, which are typically to establish and extend footholds within the information technology infrastructure of organizations for purposes of continually exfiltrating information and/or to undermine or impede critical aspects of a mission, program, or organization, or place itself in a position to do so in the future; moreover, the advanced persistent threat pursues its objectives repeatedly over an extended period of time, adapting to a defender’s efforts to resist it, and with determination to maintain the level of interaction needed to execute its objectives." (CNSSI 4009-2015)