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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block cipher



symmetric encryption algorithm with the property that the encryption algorithm operates on a block of plaintext, i.e. a string of bits of a defined length, to yield a block of ciphertext. [ISO/IEC 18033-1]

source: ISO10116, 2006


symmetric encipherment system with the property that the encryption operates on a block of plaintext, i.e., a string of bits of a defined length, to yield a block of ciphertext. [ISO/IEC 18033-1]

source: ISO18031, 2005


symmetric encryption system with the property that the encryption algorithm operates on a block of plaintext, i.e. a string of bits of a defined length, to yield a block of ciphertext.

source: ISO18033-1, 2005


symmetric encipherment system with the property that the encryption algorithm operates on a block of plaintext, i.e. a string of bits of a defined length, to yield a block of ciphertext. [ISO/IEC 18033-1:2004]

source: ISO18033-3, 2005


symmetric encipherment system with the property that the encryption algorithm operates on a block of plaintext, i.e. a string of bits of a defined length, to yield a block of ciphertext. [ISO/IEC 18033-1: 2005]

source: ISO18033-4, 2005



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