Alignment-free fingerprint cryptosystem based on multiple fuzzy vaults

It is very important to protect fingerprint templates in the fingerprint recognition systems. Fuzzy vault is a promising and applicable scheme for this purpose. It can protect biometric templates. Also it can perform secure key management. Alignment of the query fingerprint sample in the encrypted domain and the template fingerprint sample is a challenging task. In this paper, we propose an alignment-free fingerprint cryptosystem based on multiple fuzzy vaults. In the proposed method, in registration phase, multiple vaults are constructed for one fingerprint and in verification phase, if at least two of the vaults are decoded successfully by the query fingerprint, the secret will be recovered. The Experiments of the proposed fingerprint cryptosystem are conducted on FVC2002-DBla and FVC2002-DB2a data sets to evaluate the performance of the proposed fingerprint cryptosystem.