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10 Questions

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BLAKE Cryptographic Hash Function

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Questions and Answers

What is the word size used by BLAKE-512 and BLAKE-384?

128-bit words

16-bit words

64-bit words (correct)

32-bit words

How does BLAKE combine the hash value with message words to obtain the next hash value?

By adding a permuted copy of the input block

By adding round constants before each ChaCha round

By truncating the ChaCha result (correct)

By XORing the hash value with the message words

Who announced the BLAKE2 hash function based on BLAKE?

Luca Henzen

Jean-Philippe Aumasson (correct)

Willi Meier

Daniel J. Bernstein

In which year was BLAKE3, based on BLAKE2, announced?

2020 Signup and view all the answers

How many entries were there in the NIST hash function competition in 2008?

51 entries Signup and view all the answers

What is the core block transformation in BLAKE based on?

A table of 16 constant words and a table of 10 16-element permutations Signup and view all the answers

What is the main difference between BLAKE and ChaCha's quarter-round function?

BLAKE reuses the permutation of the ChaCha stream cipher with opposite direction rotations Signup and view all the answers

What are some changes that have been made to BLAKE in response to the NIST hash function competition?

The number of rounds was increased from 10/14 to 14/16 Signup and view all the answers

What was the design goal of BLAKE2 in relation to MD5 and SHA-1 algorithms?

To provide better security and performance than MD5 and SHA-1 Signup and view all the answers

What features does BLAKE2 support?

Keying, salting, personalization, and hash tree modes Signup and view all the answers