A Forward Secure Threshold Signature Scheme from Bilinear Pairing

A forward secure threshold signature scheme from bilinear pairing is proposed by combining the concept of forward security with threshold signature from bilinear pairing. In the scheme proposed the signature key is distributed into the whole group and is updated by means of updating partial keys. So the security of the signature key is enhanced and the scheme has the characters of forward security. Furthermore, for the character of partial keys-update, the scheme can prevent the mobile adversaries. The security of the scheme is also analyzed. It is shown that the proposed scheme is secure and effective.