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An information technology audit, or information systems audit, is an examination of the management controls within an Information technology (IT) infrastructure. The evaluation of evidence obtained determines if the information systems are safeguarding assets, maintaining data integrity, and operating effectively to achieve the organization’s goals or objectives.
These reviews may be performed in conjunction with a financial statement audit, internal audit, or other form of attestation engagement. IT audits are also known as “automated data processing (ADP) audits” and “computer audits”. They were formerly called “electronic data processing (EDP) audits”.
A backdoor in a computer system, a cryptosystem or an algorithm, is a method of bypassing normal authentication, securing remote access to a computer, obtaining access to plain text, and so on, while attempting to remain undetected. A special form of asymmetric encryption attacks, known as kleptography attack, resists to be useful to the reverse engineer even after it is detected and analyzed.
Unlike other exploits, denial of service attacks are not used to gain unauthorized access or control of a system. They are instead designed to render it unusable. Attackers can deny service to individual victims, such as by deliberately entering a wrong password enough consecutive times to cause the victim account to be locked, or they may overload the capabilities of a machine or network and block all users at once.