Tight Multi-user Security of Ascon and Its Large Key Extension

ePrint Report: Tight Multi-user Security of Ascon and Its Large Key Extension

Bishwajit Chakraborty, Chandranan Dhar, Mridul Nandi

The Ascon cipher suite has recently become the preferred standard in the NIST Lightweight Cryptography standardization process. Despite its prominence, the initial dedicated security analysis for the Ascon mode was conducted quite recently. This analysis demonstrated that the Ascon AEAD mode offers superior security compared to the generic Duplex mode, but it was limited to a specific scenario: single-user nonce-respecting, with a …

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