A Novel Threshold Signature Scheme Based on Elliptic Curve with Designated Verifier

摘要

Aiming at the security threats and computational complexity of existing threshold signature schemes, this paper proposes a threshold signature scheme based on elliptic curve. The scheme render no less than t legitimate and honest members to form a valid signature, where the signature is combined with the public key of the designated receiver, thus only the designated receiver can verify and decrypt the information by using his or her private key. According to the analysis, the proposed scheme has the characteristics of unforgeability, confidentiality and integrity of messages. Moreover, the scheme has good robustness, consumes less computing resources, and lower communication bandwidth.