Special issue on provable security

Convertible authenticated encryption (CAE) schemes allow a signer to produce an authenticated ciphertext such that only a designated recipient can decrypt it and verify the recovered signature. The conversion property further enables the designated ...

In this paper we propose a very efficient and provably secure proxy signature scheme with implicit certificate (called ''certificateless proxy signature scheme''), where a receiver does not have to verify a certificate before verifying a signed message, ...

For facilitating the confidential transaction with delegation such as on-line proxy auction and business contract signing by an authorized proxy, we propose an efficient proxy signcryption scheme from pairings. Our scheme allows an original signer to ...