Multi-receiver signcryption method, sender, receiver, system and storage medium

Abstract

The invention relates to a multi-receiver signcryption method, a sending end, a receiving end, a system and a storage medium. The identity of the sender is hidden in an identity set during each broadcast communication, and the identity set of the sender is needed in the communication process The public keys of all identities in the public key are signed by ring signature method to hide the real identity of the sender, thus realizing the anonymity of the sender, and the set of senders will be sent to the receiver through ciphertext, and all receivers can confirm the sending Whether the sender is in a trusted set; prevent the potential sender's identity information leakage and ensure the sender's trustworthiness during broadcast communication, protect the privacy of all communication parties, and improve the security of the multi-receiver signcryption method.

Description

technical field [0001] The invention relates to the field of network security, in particular to a multi-receiver signcryption method, a sending end, a receiving end, a system and a storage medium. Background technique [0002] With the development of society, people pay more and more attention to privacy protection. In some application scenarios of multi-receiver signcryption (anonymous voting, anonymous data sharing, whistleblower reporting, etc.), in order to protect the privacy of the sender, it is necessary to implement the sender Anonymity, in order to prevent malicious senders, the receiver needs to trust the sender; however, most multi-receiver signcryption schemes cannot guarantee the receiver's trust in the sender based on the anonymity of the sender. A secure multi-receiver signcryption scheme should be able to realize the technology that a sender can send messages to multiple authorized receivers securely, and can realize the above-mentioned security requirements....

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a multi-recipient signcryption method, sending end, receiving end, system and storage medium, so that the sender of the message can be anonymous within the trusted range, the receiver can trust the receiver, and solve the problem of In the above-mentioned prior art, the problem of low efficiency due to the use of operations with large computational overhead in the process of encryption and decryption

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