Cryptology ePrint Archive: Report 2011/299
On Authenticated Encryption Using Stream Ciphers Supporting an Initialisation Vector
Abstract: We describe a systematic framework for using a stream cipher supporting an
initialisation vector (IV) to perform various tasks of authentication and
authenticated encryption. These include message authentication code (MAC),
authenticated encryption (AE), authenticated encryption with associated data
(AEAD) and deterministic authenticated encryption (DAE) with associated data.
Several schemes are presented and rigourously analysed.
A major component of the constructions is a keyed hash function having
provably low collision and differential probabilities.
Methods are described to efficiently extend such hash functions to take
double inputs and more generally multiple inputs.
In particular, double-input hash functions are required for the construction
of AEAD schemes. An important practical aspect of
our work is that a designer can combine off-the-shelf stream ciphers with
off-the-shelf hash functions to obtain secure primitives for MAC, AE, AEAD
Category / Keywords: secret-key cryptography /
Date: received 6 Jun 2011, last revised 21 Sep 2012
Contact author: palash at isical ac in
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Version: 20120921:112144 (All versions of this report)
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