Audit Information systems & IT Security
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Audit Information systems & and IT Security

Information System audit and IT Security

Definitions and Terminology

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entropy



measure of the disorder, randomness or variability in a closed system. The entropy of X is a mathematical measure of the amount of information provided by an observation of X.

source: ISO18031, 2005


Total amount of information yielded by a set of bits. It is representative of the work effort required for an adversary to be able to reproduce the same set of bits.

source: ISO18032, 2005



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Auditing Security and IT Systems
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