Research On Biometric Template Protection Based On Symmetric Predicate Encryption

Biometric authentication technology as a means of identity authentication, Our daily life is more and more convenient, has become more widely used. Such as fingerprint attendance system, etc. Biometric identity authentication system bases on users’biological physiological structure features and behavior patterns for authentication, because these biological characteristics are on the physiology and behavior associated with the user directly, it is difficult to intercept, so compared to the traditional password discriminant method, biometrics is a natural way and more reliable authentication technology. Therefore, compared with the traditional identity authentication system based on password, using the latest biometric identification technology of identity authentication system can provide better security. Biometric signals are immutable and can be closely related to individuals’information, When more and more biometric templates stored in large server needs, but these biometric template stored in large server security is not given, if lost, most templates are not replicated, the consequences are serious, or template in the query stolen, such biometric authentication security is not guaranteed.Predicate encryption in public key cryptography is a new research direction. Predicate Encryption is extended on the basis of public-key cryptography, public key cryptography, including the (identity-based encryption, encryption based on attributes, etc.). Predicate encryption can evaluate the predicate of encrypt data, encrypted data queries and fine-grained access control provides a new solution. The idea of this article is to use symmetric encryption predicate in the predicate encryption to encrypt biometric data, we learned traditional query encrypted data can only guarantee the confidentiality of information, not protect the privacy of the keyword query, the query in a timely manner to ensure that the keywords privacy, but also to have certain requirements for data query, data is too large, may disclose information query part of the ciphertext. Symmetric encryption scheme predicate can not only encrypt the content, but also to achieve the query keywords privacy protection, with full security.In this paper, using the fingerprint of data, for example, with a symmetric predicate encryption to encrypt it, test it for safety, and the safety of the query keywords, this analogy to other biometric data, such as:Palm, Iris, Vein.