Cancelable Palmprint Feature Generation Method Based on Minimum Signature

With the emphasis on biometric privacy protection, this paper proposes a method for generating cancelable palmprint features based on minimum signature. Firstly, orthogonal features of ROI of palmprint are extracted. In order to realize a layer of security and cancelability of palmprint features, a chaotic matrix is randomly generated as the key, and then xor orthogonal features form the initial feature matrix. Then the signature matrix is generated by generating hash function randomly. The initial value of signature matrix is infinite. The initial feature matrix is scanned and calculated by using the generated hash function, and the larger value in the original signature matrix is replaced by the minimum value to form a final signature matrix as a cancelable palmprint feature stored in the database. Experiments and theoretical analysis prove that the scheme can maintain high recognition performance and effectively protect the privacy of palmprint.