New ECDSA-Verifiable Multi-receiver Generalization Signcryption

Multi-receiver signcryption is a new cryptographic primitive that simultaneously fulfills both the functions of signature and multi-receiver encryption. Generalized Multi-Receiver signcryption can provide authenticity or confidentiality separately under specific inputs. Based on ECDSA, a generalized Multi-Receiver signcryption scheme is designed. It will be equivalent to ECDSA or multi-receiver encryption when one of party is absent. Compared with others, this scheme is based on the efficient and provably secure scheme ECDSA. It can work with three modes: signcryption, signature and encryption. A trusted party can verify the signcryption text publicly in the method of ECDSA.