Several security schemes constructed using ECC-based self-certified public key cryptosystems

摘要

In this paper, we develop an efficient ECC-based self-certified public key cryptosystem (ECCSCPKC) quite suitable for efficiently securing electronic transactions. The proposed ECCSCPKC is constructed based on the elliptic curve cryptosystems (ECC) and the ID-based self-certified public key cryptosystems. The approaches proposed in this paper possess the following advantages:(1)When verifying the validity of public key, it does not need to spend extra much time to verify the signature in the digital certificate used in the certificate-based public key cryptosystem.(2)Both distributing a session key and verifying the validity of public key can be concurrently achieved in a logically single step.(3)Verifying both a signature and the validity of public key can be concurrently accomplished in a logically single step.(4)Both decrypting a cipher correctly and verifying the validity of public key can be concurrently finished in a logically single step.(5)Since the proposed methods are combined with the ID-based and ECC public key cryptosystems, they can reduce the computation cost greatly.In summary, based on the above characteristics, the proposed ECCSCPKC and its related security schemes can gain much efficiency in saving both the communicational cost and the computational effort, because they can simplify public key distribution. Also, since the proposed ECCSCPKC does not need to manage the key directory, the cost of system maintenance can be greatly reduced.