Cryptographic key generation from cancelable fingerprint templates
Arpita Sarkar, Binod Kumar Singh · 2018
An Outsized keys of various sizes such as 256,192 or 128 binary digits are being used for the existing symmetric cryptographic algorithms. These long keys are very tough to recollect. Consequently, key is deposited in a plastic card with a built-in microprocessor, tokens which cannot be tampered. Also an authentication based on password can be used to restrict the access of key related to cryptography. But there is every chance that these user nominated passwords can be lost, taken or predicted by dictionary attacks. Moreover, in symmetric cryptography there is another probable risk of safety that is copy of same secret key exists with receiver and sender and this must be kept secret. Probable solution to above deliberated key management problem is by using biological data of both receiver and sender in all sessions of communication. One of the foremost problem with biometrics is that once it gets negotiated it can't be reused. For cancelling and reissuing biometrics template, cancelable biometrics has been anticipated so that the above mentioned problem may be overcome. A method to generate 128 bit symmetric key using cancelable fingerprint template of receiver and sender is being proposed in this current work. This present approach confirms the privacy of fingerprints by one way transformation of original template into cancelable one as well as resolves the difficulty of key storage and key distribution. The reason is that in this approach the key is neither deposited in any location nor it is sent to the receiver.