Problem 44924. Create State Array for initiating SHA-3-224 Hash

Created by David Hill

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Create binary represented state array (as the initial input to the sponge function (f)) from any length character array (N) with width (b=1600), digest length (d=224) and lane size (w=64) using SHA-3 Standard:
https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf    
Convert character array to binary representation using UTF-8 value of each character. Output state array will be a matrix with size (5,5,64). Padding in accordance with the standard is required. XOR of the rate bits (r) with the padded message stream is required (see figure 7, page 18). Just the first 1600 bit input to the first function (f) represented as a state array (see section 3.1.2) is required for the output.

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Last Solution submitted on May 02, 2025

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Alfonso Nieto-Castanon on 23 Aug 2020

this looks like a very cool problem, perhaps a bit of a summary description of the standard (c.f. 27-page doc) may help make it a bit more enticing for curious but non-crypto-oriented people like myself?

David Hill on 19 Oct 2020

Added some references to the problem description.

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Problem 44924. Create State Array for initiating SHA-3-224 Hash

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Problem 44924. Create State Array for initiating SHA-3-224 Hash

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