"Corresponds to the information that should be available when necessary and in the appropriate format." (José M Gaivéo, "Security of ICTs Supporting Healthcare Activities", 2013)
"A property by which the data is available all the time during the business hours. In cloud computing domain, the data availability by the cloud service provider holds a crucial importance." (Sumit Jaiswal et al, "Security Challenges in Cloud Computing", 2015)
"Availability: the ability of the data user to access the data at the desired point in time." (Boris Otto & Hubert Österle, "Corporate Data Quality", 2015)
"It is one of the main aspects of the information security. It means data should be available to its legitimate user all the time whenever it is requested by them. To guarantee availability data is replicated at various nodes in the network. Data must be reliably available." (Omkar Badve et al, "Reviewing the Security Features in Contemporary Security Policies and Models for Multiple Platforms", 2016)
"Timely, reliable access to data and information services for authorized users." (Maurice Dawson et al, "Battlefield Cyberspace: Exploitation of Hyperconnectivity and Internet of Things", 2017)
"A set of principles and metrics that assures the reliability and constant access to data for the authorized individuals or groups." (Gordana Gardašević et al, "Cybersecurity of Industrial Internet of Things", 2020)
"Ensuring the conditions necessary for easy retrieval and use of information and system resources, whenever necessary, with strict conditions of confidentiality and integrity." (Alina Stanciu et al, "Cyberaccounting for the Leaders of the Future", 2020)
"The state when data are in the place needed by the user, at the time the user needs them, and in the form needed by the user." (CODATA)
"The state that exists when data can be accessed or a requested service provided within an acceptable period of time." (NISTIR 4734)
"Timely, reliable access to information by authorized entities." (NIST SP 800-57 Part 1)
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