Author(s)

Peng Wei, Bai Xia

Corresponding Author

Peng Wei

ABSTRACT

Under the random oracle model, most identity based signature schemes without trusted PKG are secure. The identity based signature scheme is effective and provably secure under the standard model, does not need trusted PKG, and is suitable for applications. Because the user's private key can't be forged in the scheme, it can't be generated only in the part of PKG. In the case of computational difficulty, the scheme's attack on adaptive selection message is the existence of the unforgeable Herman hypothesis in the standard model. The scheme sloves the inherent key escrow problem, but also has traceability.

KEYWORDS

id-based signature, key escrow, CDH problem, standard model