Abstract
To ensure privacy and secrecy of biometric data, template protection schemes are widely used. Template protection schemes ensure renewability, irreversibility, and unlinkability among the templates. The Fuzzy Commitment Scheme is one of the widely used template protection schemes. This biometric cryptosystem combines cryptography and error correction codes. The original fuzzy commitment scheme is not secure. In this paper, an improved fuzzy commitment scheme has been introduced. The introduced scheme is validated using biometric data from the CASIA-Iris-Thousand dataset. In this paper, improved fuzzy commitment scheme or code-offset constructions are presented that use more than one key to secure the biometric data. The additional keys increase the exhaustive search space. The additional key made it impossible for an intruder to utilize the decoding algorithms to gain information about the user biometrics.
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