CERTIFIED-IN-CYBERSECURITY Question #769: Real Exam Question with Answer & Explanation

The correct answer is B: Reversible. A cryptographic hash function should be unique, deterministic, useful, tamper-evident (also referred to as 'the avalanche effect' or 'integrity assurance') and non-reversible (also referred to as 'one-way'). Nonreversible means it is impossible to reverse the hash function to der

Security Principles

Question

Which of the following is NOT a feature of a cryptographic hash function?

Options

AUseful
BReversible
CUnique
DDeterministic

Explanation

A cryptographic hash function should be unique, deterministic, useful, tamper-evident (also referred to as 'the avalanche effect' or 'integrity assurance') and non-reversible (also referred to as 'one-way'). Nonreversible means it is impossible to reverse the hash function to derive the original text of a message from its hash output value (see ISC2 Study Guide, chapter 5, module 1, under Encryption Overview). Thus, the 'reversible' feature is not a feature of a hash function.

Topics

#Cryptographic Hash Functions#Cryptography#Hashing Properties#Data Integrity

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