Systems and Methods for Improving a Cryptosystem using Biometrics

Abstract

The patent describes systems and methods to improve cryptosystems, which in one implementation provides Biometric-Gaussian-Stream (BGS) cipher with new aspect of image encryption--data hiding. More specifically, the systems and methods encrypt any image/biometric template using stream cipher and a Gaussian noise function while using biometric data as an encryption key. For example, in one exemplary embodiment, the system uses a Gabor wavelet to generate iriscode for iris bits (Ө) generation. In another embodiment, the system utilizes smart card technology comprising stored biometric data. The Keystream used in this novel system is generated with help of biometrics (e.g., an Iris code) to encrypt multimedia objects like a picture or even an iris image. The selection of bits for inputs to a linear feedback shift register (“LFSR”) key is done, for example, by hamming code method