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TETSU Iwata

Authenticated Encryption Mode for Beyond the Birthday Bound Security

Abstract

In this talk, I will describe an authenticated encryption mode for blockciphers, called AE1. It has provable security bounds which are better than the usual birthday bound. Besides, AE1 allows parallel executions of blockcipher calls and finite field multiplications. The design is based on the encrypt-then-PRF approach, where the encryption part uses a key stream generation of CENC, and the PRF part combines a hash function based on the inner product and a blockcipher.

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