IACR News item: 19 April 2015
Megha Agrawal, Donghoon Chang, Somitra Sanadhya
ePrint ReportIn this paper we explain this generalized technique using our new construction sp-AELM. sp-AELM is a sponge based authenticated encryption scheme that provides support for limited memory devices. We also provide its security proof for privacy and authenticity in an ideal permutation model, using a code based game playing framework. Furthermore, we also present two more variants of sp-AELM that serve the same purpose and are more efficient than sp-AELM.
The ongoing CAESAR competition has 9 submissions which are based on the Sponge construction. We apply our generalized technique of storing single intermediate state to all these submissions, to determine their suitability with a Crypto module having limited memory. Our findings show that only ASCON and one of the PRIMATE\'s mode(namely GIBBON) satisifes the limited memory constraint using this technique, while the remaining 8 schemes (namely, Artemia, ICEPOLE, Ketje, Keyak, NORX, $\\pi$-Cipher, STRIBOB and two of the PRIMATEs mode: APE \\& HANUMAN) are not suitable for this scenario directly.
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