It is a worthwhile challenge to deal with the key-exposure problem in identity-based signatures.

Most of identity-based signature schemes are secure in the random oracle model,but for which any implementation of the random oracle results in insecure schemes.

This paper offers arguments for the provable security of a class of ID-based signature schemes called ID-based generic signature schemes in the random oracle model.

Based on the ID-based signature scheme given by Cha and Cheon, we propose an ID-based aggregate signautre scheme from m-torsion groups of elliptic curves.

This paper presents a hierarchical identity based signature scheme from a modification of Waters proposed identity based encryption scheme.

Based on bilinear pairing on the elliptic curve and provable signatures,an ID-based proxy signature scheme is presented,which overcomes the shortcomings of security of the several existing signature schemes.

A delegation-by-certificate proxy signature scheme and an ID-based proxy signature scheme are proposed under assumption of a factorization problem.

In this paper, an ID-based Chameleon Hash function from the bilinear pairing is proposed, according to which an ID-based Chameleon signature scheme is constructed.