Ascon (cipher)

For other uses, see Ascon.
Ascon
General
DesignersC. Dobraunig, M. Eichlseder, F. Mendel, M. Schläffer
First published2014
Cipher detail
Key sizesup to 128, 128 bits are recommended
Block sizesup to 128 bits, 128 and 64 bits are recommended
Structuresponge construction
Rounds6–8 rounds per input word recommended

Ascon is a family of lightweight authenticated ciphers and hash functions that have been selected by the U.S. National Institute of Standards and Technology (NIST) for cryptography on resource-constrained devices in 2025, specified in NIST SP 800-232.

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