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Introduction to Cyber Security and Information Assurance. Center of Excellence for IT at Bellevue College.
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Center of Excellence for IT at Bellevue College
Cyber security and information assurance refer to measures for protecting computer systems, networks, and information systems from disruption or unauthorized access, use, disclosure, modification, or destruction.
Information assurance (IA) is the practice of managing information-related risks. More specifically, IA practitioners seek to protect and defend information and information systems by ensuring confidentiality, data integrity, authentication, availability, and non-repudiation. IA measures include providing for restoration of information systems by incorporating protection, detection, and reaction capabilities.
Confidentiality has been defined by the International Organization for Standardization (ISO) as "ensuring that information is accessible only to those authorized to have access" and is one of the cornerstones of information security. Confidentiality is one of the design goals for many cryptosystems, made possible in practice by the techniques of modern cryptography.
Data integrity means that the data is "whole" or complete, and is identically maintained during any operation (such as transfer, storage or retrieval). Data integrity is the assurance that data is consistent and correct.
Loss of integrity can result from:
Authentication is a security measure designed to establish the validity of a transmission, message, document or originator, or a means of verifying an individual's authorization to receive specific categories of information.
Authentication technologies include:
Availability means that the information, the computing systems used to process the information, and the security controls used to protect the information are all available and functioning correctly when the information is needed = timely, reliable access to data and information services for authorized users.
Non-repudiation is the assurance the sender of data is provided with proof of delivery and the recipient is provided with proof of the sender's identity, so neither can later deny having processed the data.