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Cryptographic hashes are often used for message integrity and password storage. It is important to understand the common properties of all cryptographic hashes. What is not true about a hash?

A.
Few collisions
Answers
A.
Few collisions
B.
Reversible
Answers
B.
Reversible
C.
Variable length input
Answers
C.
Variable length input
D.
Fixed length output
Answers
D.
Fixed length output
Suggested answer: B

Explanation:

Reversible

https://en.wikipedia.org/wiki/Hash_function

Hash functions are not reversible.

Incorrect answers:

Fixed length output and Variable length input. Hash function receive variable length input and produce fixed length output

Few collisions. Every hash function with more inputs than outputs will necessarily have collisions

asked 18/09/2024
Scott Whitney
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