Deniable and Accountable Searchable Message-Moderation System with Multi-Recipient

Encrypted retrieval for multiple recipients ensures secure retrieval of encrypted messages and achieves confidentiality. Its application in database systems has made the primitive noteworthy. Traditional encryption retrieval struggles to provide message-moderation once a malicious sender transmits incorrect messages. We present the concept of searchable message-moderation with multi-recipient. In a word, our scheme achieved by combining asymmetric group message franking and searchable encryption with multi-recipient. Security analysis shows the scheme meet confidentiality, accountability, deniability and receiver anonymity. Finally, we conducted an efficiency analysis of the proposed scheme, demonstrating that it is efficient and practical.