A signature scheme with the one-off blind public key was proposed based on identity-based cryptography

and thus was applied in a new fare non-repudiation protocol.In this protocol

the sender was anonymity

so avoid that the recipient deliberately rejected the files or delayed reading the files when the files were not good for them

which could assure the equity and non-repudiation of the communication between the sender and the recipient.The signature scheme with the one-off blind public key and non-repudiation protocol is both secure and effective by analysis.