Authentication Using Fuzzy Vault Based on Iris Textures

Crypto-biometrics is an emerging architecture where cryptography and biometrics are merged to achieve high level security systems. This paper explores the realization of cryptographic construction called fuzzy vault to store digital signature based on iris pseudo textures. Iris pseudo textures such as nodes and end points does not change through out the life period of user and can be used to extract minutiae to lock and unlock the fuzzy vault. The proposed algorithm aims to create a fuzzy vault to store secret key, based on iris pseudo textures. The algorithm has two phases: The first is to extract binary key (digital signature) from iris textures, and the second to generate fuzzy vault by using Lagrange interpolating polynomial projections, further which is projected by using data units extracted from iris minutiae.