The cancellable fingerprint bio-cryptosystems based on the fingerprint binary string is study under the premise of protecting the security of fingerprint privacy. During the registration, first detect the fingerprint singular point as the base point, and extract the binary string from the fingerprint as the fingerprint feature, then generate the fingerprint key and auxiliary information by combining the error-correct code and fuzzy scheme. Finally, during the authentication, the fingerprint key could be recovered by auxiliary information and homology fingerprint. Experiments demonstrate that the proposed biometric cryptosystem has good recognition performance. And security analysis indicates that the security strength of the proposed biometric cryptosystem can satisfy the need of current security circumstances.
