Mediated Traceable Anonymous Encryption

the full version of the extended abstract which appears in Latincrypt '10 (august 8-11, 2010, Puebla, Mexico) M. Abdalla and P. Barreto Eds., Springer-Verlag, LNCS 6212, pages 4060. Mediated Traceable Anonymous Encryption Malika Izabachène1, David Pointcheval2, and Damien Vergnaud2 1 UVSQ, France 2 ENS/CNRS/INRIA, Paris, France The notion of key privacy for asymmetric encryption schemes was formally dened by Bellare, Boldyreva, Desai and Pointcheval in 2001: it states that an eavesdropper in possession of a ciphertext is not able to tell which specic key, out of a set of known public keys, is the one under which the ciphertext was created. Since anonymity can be misused by dishonest users, some situations could require a tracing authority capable of revoking key privacy when illegal behavior is detected. Prior works on traceable anonymous encryption miss a critical point: an encryption scheme may produce a covert channel which malicious users can use to communicate illegally u...

• Type: Journal
• Year: 2010
• Where: LATINCRYPT
• Authors: Malika Izabachène, David Pointcheval, Damien Vergnaud
• Keywords: Ciphertexts, Cryptology, Key Privacy, LATINCRYPT 2010, Traceable Anonymous Encryption