ID-based multisignatures with distinguished signing authorities for sequential and broadcasting architectures

The multisignatures achieve the purpose for many individuals to cooperatively sign the same document. However, for the sake of the division of labor, it might be required that each individual sign a partial group message that he is responsible for. These schemes are called multisignatures with distinguished signing authorities. Based on the difficulty of the factorization problem, we proposed two ID-based multisignature schemes with distinguished signing authorities. One scheme is suitable for the sequential architecture and the other for the broadcasting one.