Attacks on the Birational Permutation Signature Schemes.

Don Coppersmith Jacques Stern Serge Vaudenay Attacks on the Birational Permutation Signature Schemes. 435-443 http://dx.doi.org/10.1007/3-540-48329-2_37 1993 conf/crypto/1993 CRYPTO db/conf/crypto/crypto93.html#CoppersmithSV93