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The authors propose new special identity based signature schemes that make uses of fractal transform and entropy arrangement algorithm to generate the public key string from a biometric measurement of signer. A biometric reading provided by the alleged signer would be enough to verify the signature. The characteristic of this scheme is that when verifier finished the verification on the signature, the verifier can compare the biometric information reconstructed by public key with that provided by signer to ensure the relationship between the public key and signer. So, this makes the verification more convenient and intuitionistic. Finally, they describe two possible attacks on this system and suggest ways to combat it.
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