Questions tagged [sha-3]

SHA-3, also known as Keccak, is a cryptographic hash function standardized by NIST as a new alternative to the SHA-2 hash function family.

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Clarification about the iota function of SHA-3

I am trying to implement SHA-3 using this document and have a question about the iota step. This step consists in a single XOR between the central (0, 0) lane of the state (illustration of the state p....
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Exact security requirements for extendable output functions (XOF)?

In the FIPS202 document "SHA-3 Standard: Permutation-Based Hash and Extendable-Output Functions" an extendable-output functions is defined as: An extendable-output function (XOF) is a ...
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Lightweight encrypting for BLE advertising packets

I'm new to encryption and this is my first time working with it. I'm currently working on a home project which consists of the equipment in my garage to be attached with a BLE device which sends ...
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Is there any cipher standard based on SHA-3, where it is not used as part of RFC2104?

I'm thinking about using a cipher, which uses AES CTR+SHA-3. My basic idea is this: IV|AES-CTR(PLAINTEXT_SIZE|PLAINTEXT|SHA-3(KEY|PLAINTEXT_SIZE|PLAINTEXT)) So, ...
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How do I use XOF (SHAKE and cSHAKE) in openssl CLI and JavaScript

I am learning about hash functions and I just read about XOF (namely shake and cShake). I will like to test this functions out by myself but I can't seem to find how to use it via the OpenSSL CLI or ...
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Using a bit sequence of zeros followed by one byte in Keccak

For what purpose it is not right to use a bit sequence of 2000+ zeros followed by one byte in Keccak? Is there a possible application of such input for Keccak? If yes, after which transformation?
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Security implication of concatenating two hashes using different algorithms

Background Hashing files is an expensive thing for CPU. I am tasked to write a secure digital signature scheme. For that, I decided to check the integrity of files using Hash/Digest. To be more secure,...
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