An Efficient Identity-Based Threshold Signature

An efficient identity-based threshold signature scheme is proposed by using bilinear pairs technology. The scheme uses user´s identity information as public key such as email address, IP address, telephone number so that it erases the cost of forming and managing public key infrastructure and avoids the problem of user´s storing and delivering public key and its certificate. The timing cost of signing and verifying in the scheme is only 1/3 of that scheme by comparing their emulating result.