Multi-receiver signcryption method, sending end, receiving end, 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 a sender is hidden in an identity set during each broadcast communication, public keys of all identities in the identity set of the sender need to be used in the communication process, signcryption is carried out in a ring signature mode, the real identity of the sender is hidden, and the signcryption efficiency is improved. Therefore, the sender anonymity is realized, the sender set can be sent to the receivers through the ciphertext, and all the receivers can confirm whether the senders are in a trusted set or not; the problem of potential sender identity information leakage during broadcast communication is prevented, the credibility of the senderis ensured, the privacy of each communication party is protected, and the security of the multi-receiver signcryption method is improved.

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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