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BioEncoding is a recently proposed template protection scheme, based on the concept of cancelable biometrics, for protecting biometric templates represented as binary strings such as IrisCodes. Unlike existing techniques, BioEncoding does not require user-specific keys and/or tokens during verification. Besides, it satisfies all the requirements of the cancelable biometrics construct without deteriorating the matching accuracy of the original biometric system. However, although the cancelable transformation employed in BioEncoding is non-invertible for a single protected template, it might be possible to recover the original biometric template by correlating several protected templates created from the same biometric signal.
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