A New ID-Based Threshold Proxy Signature Scheme

Abstract

The existing ID based threshold proxy signature schemes have the problem of key escrow. Based on identity based signature without trusted PKG, an identity based threshold proxy signature is constructed. This scheme prevents PKG from forging the signature of legitimate users, because PKG only generates part of the private key. The new ID based threshold proxy signature scheme solves the key escrow problem, it also meets all the security requirements of the threshold proxy signature scheme.