A New Efficient ID-Based Verifiably Encrypted Signature Scheme

Based on the Hess signature scheme, a new efficient ID-based verifiably encrypted signature scheme was proposed. The scheme had the less pairing operations, and adjudicator signed a guarantee to avoid refusing to extract the common signature when resolving conflicts, thereby exchange signature protocol´s fairness was enhanced. Compared with the other schemes, the proposed scheme was more efficient. At last its security was proved in the random oracle model. The proposed scheme was proved to be security assuming the computing Diffie-Hellman problem was hard.