Committing Security of Ascon: Cryptanalysis on Primitive and Proof on Mode
Yusuke Naito,
Yu Sasaki,
Takeshi Sugawara
Abstract:Context-committing security of authenticated encryption (AE) that prevents ciphertexts from being decrypted with distinct decryption contexts, (K,N,A) comprising a key K, a nonce N, and associate data A is an active research field motivated by several real-world attacks. In this paper, we study the context-committing security of Ascon, the lightweight permutation-based AE selected by the NIST LWC in 2023, for cryptanalysis on primitive and proof on mode. The attacker’s goal is to find a collision of a cipherte… Show more
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