Biometric Information Security System Based on Nonlinear Encryption Scheme
Gayathri S P1, Sajeer M2

1Gayathri S P, Department of Electronics and Communication Engineering, Sree Chitra Thirunnal College Of Engineering, Trivandrum (Kerala), India.
2Sajeer M , Department, of Electronics and Communication Engineering, Sree Chitra Thirunnal College of Engineering, Trivandrum (Kerala), India.

Manuscript received on 13 April 2017 | Revised Manuscript received on 20 April 2017 | Manuscript Published on 30 April 2017 | PP: 258-262 | Volume-6 Issue-4, April 2017 | Retrieval Number: D4979046417/17©BEIESP
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Abstract: With the growth of multimedia and digital technology the transmission over public channel become more common and also the issues with the confidentiality and integrity of data increases in an alarming rate. Biometric characteristics such as fingerprint , iris , palm print, gestures, handwritten signature and hand geometry have to be considered as an efficient tool for establishing the identity of an individual. Because they contain the unique characteristics of a person. So we proposed a method, to protect the biometric information from any of the unauthorized access. Which utilizes an orthogonal coding and multiplexing technique, direct LSB replacement steganography technique and finally a chaotic encryption method. Multiple biometric signatures are encoded and then multiplexed together in the form of a single image using orthogonal encoding and multiplexing.The encoded image is embedded in to the colour cover image ,which is decomposed in to three plane namely red ,green ,blue respectively. In steganography technique, the multiplexed image pixel is used to replace the LSB of corresponding colour cover image pixel for information hiding purpose. Finally, the stego image is encrypted using a non linear encryption technique.The objective of this paper is to develop a novel and efficient technique to protect the Biometric Information from any unauthorized access and also reduces the vulnerability of an intruder to retrieving any information through any steganalysis attack .In addition to this technique can also accommodate a number of different biometric information in the same cover image while maintaining the negligible amount of distortion when compared with original colour cover image. The encrypted images are random, non repeated and unpredictable. Chaotic encryption have excellent diffusion and confusion properties and can resist the any plaintext attack. The Performance of the proposed technique was investigated through matlab simulation using various biometric signatures and colour cover images.
Keywords: Orthogonal Transform, Steganography, Nonlinear Encryption , Chaotic System

Scope of the Article: Encryption Methods and Tools