International Journal of Engineering Research in Computer Science and Engineering (IJERCSE)

Fuzzy Bio-Cryptography Key Generation

Author : Dr. Dayananda. R. B. ¹ Dr. R. Sanjeev Kunte ² Mr. Gowreesha. H. B. ³ Mr. Chandrashekar. B. S. ⁴

Date of Publication :7th May 2016

Abstract: Cryptography is one of the most effective ways to enhance the information security. In the traditional cryptographic algorithms, such as AES and DES etc, information is encrypted and decrypted using cipher keys. Simple keys are easy to be memorized while they are also easy to be cracked. On the other hand, the complex keys are difficult to be cracked while they are also difficult to be remembered and have to be stored in somewhere which can be stolen or lost. To solve these problems, biometric features, which cannot be forgotten, stolen, shared and cracked, have been combined with the cryptography to form biometric cryptography. Bio-cryptography integrates cryptography and biometrics to take advantage of the strengths of both fields. Biocryptographic techniques protects secret key by using biometric feature or generates a key from biometric features. The fingerprint biometric which is unique to the individual is used. Minutiae features are extracted from pre-processed fingerprint images. Cubic spline curve is fitted using bifurcation points of the extracted minutiae. A secret key of 128 bit length is formed by combining the control points of the cubic spline curve. This key can be used with any standard cryptography algorithm for encrypting the file. To decrypt the file, user’s fingerprint image is matched with the registered database and on successful match key is released. An overall recognition rate of about 85% is obtained by the system.

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