Multiplex: TBC-Based Authenticated Encryption with Sponge-Like Rate

Abstract: Authenticated Encryption (AE) modes of operation based on Tweakable Block Ciphers (TBC) usually measure efficiency in the number of calls to the underlying primitive per message block. On the one hand, many existing solutions reach a primitive-rate of 1, meaning that each n-bit block of message asymptotically needs a single call to the TBC with output length n. On the other hand, while these modes look optimal in a blackbox setting, they become less attractive when leakage comes into play, since all these calls must then be equally well protected to maintain security. Leakage-resistant modes improve this situation, by generating ephemeral keys every constant number of calls. However, rekeying is inherently suboptimal in primitive-rate, since a TBC call can only be used either to refresh a key or to encrypt a block. Even worse, existing solutions achieving almost n bits of security for n-bit secret keys have at most a primitive-rate 2/3. Hence the question: Can we design a highly-se.... https://tosc.iacr.org/index.php/ToSC/article/view/11618

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: Multiplex: TBC-Based Authenticated Encryption with Sponge-Like Rate ; volume:2024 ; number:2 ; year:2024 ; IACR transactions on symmetric cryptology ; 2024, Heft 2 (2024)

Beteiligte, Orts- und Zeitangaben

• Urheber: Shen, Yaobin ; Peters, Thomas ; Standaert, François-Xavier

Weitere Informationen

• DOI: 10.46586/tosc.v2024.i2.1-34
• URN: urn:nbn:de:101:1-2407031856203.181157534421
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 14.08.2025, 10:57 MESZ