Fran├žois Grieu

Email: email

Academic Papers

A Chosen Messages Attack on the ISO/IEC 9796-1 Signature Scheme, in proceedings of Eurocrypt 2000.
Lecture (48kB PDF)
Paper (216kB PDF) (72kB gzipped PS) (88kB gzipped DVI) (13kB gzipped TeX).

This was essentially incorporated in a later reference paper with Don Coppersmith, Jean-Sebastien Coron, Shai Halevi, Charanjit Jutla and Julien Stern:
Cryptanalysis of ISO/IEC 9796-1, in Journal of Cryptology (2008).
Paper (316kB PDF).

The ISO/IEC 9796:1991 standard has been withdrawn in 2000 by ISO/IEC, but can still be purchased as an INCITS standard.
A free online source is section 11.3.5 in the excellent (though slightly dated) Handbook of Applied Cryptography.

I announced the attack on August 30, 1999 in an sci.crypt.research post.
Here is the mentioned file with messages allowing the attack. Same gzipped, for hash verification purposes.

This page was revised on 2022-05-28