Chameleon Digital Signature Scheme Based on (t,n) Threshold

A(t,n) threshold signature allows t or more members of the group to generate a signature on behalf of the group while providing the anonymity of the signers.Unfortunately,most of(t,n) threshold signature schemes proposed so far lead to more overhead of communication and computation because of interaction in the verify of signature.Chameleon signature is based on traditional hash and sign paradigm,a secure chameleon scheme provides the properties of non-interaction,non-transferability and non-repudiation.In this paper,we propose a new chameleon digital scheme based on(t,n) threshold.The feature of the proposed scheme is more efficient with communication and computation.