Strengthening McEliece Cryptosystem
- Cite this paper as:
- Loidreau P. (2000) Strengthening McEliece Cryptosystem. In: Okamoto T. (eds) Advances in Cryptology — ASIACRYPT 2000. ASIACRYPT 2000. Lecture Notes in Computer Science, vol 1976. Springer, Berlin, Heidelberg
McEliece cryptosystem is a public-key cryptosystem based on error-correcting codes. It constitutes one of the few alternatives to cryptosystems relying on number theory. We present a modification of the McEliece cryptosystem which strengthens its security without increasing the size of the public key. We show that it is possible to use some properties of the automorphism groups of the codes to build decodable patterns of large weight errors. This greatly strengthens the system against the decoding attacks.