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New CBC-MAC Forgery Attacks

2001; Springer Science+Business Media; Linguagem: Inglês

10.1007/3-540-47719-5_2

1611-3349

Karl Brincat, Chris J. Mitchell,

Security and Verification in Computing

This paper is concerned with a particular type of attack against CBC-MACs, namely forgery attacks, i.e. attacks which enable an unauthorised party to obtain a MAC on a data string. Existing forgery attacks against CBC-MACs are briefly reviewed, together with the effectiveness of various countermeasures. This motivates the main part of the paper, where a family of new forgery attacks are described, which raise serious questions about the effectiveness of certain countermeasures.