Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data

Details Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data

2006-02-04

arxiv.org/abs/cs/0602007v4

SIAM Journal on Computing, 38(1):97-139, 2008

Computer Science

Cryptography and Security

47 pp., 3 figures. Prelim. version in Eurocrypt 2004, Springer LNCS 3027, pp. 523-540. Differences from version 3: minor edits

Scientific paper

10.1137/060651380

We provide formal definitions and efficient secure techniques for - turning noisy information into keys usable for any cryptographic application, and, in particular, - reliably and securely authenticating biometric data. Our techniques apply not just to biometric information, but to any keying material that, unlike traditional cryptographic keys, is (1) not reproducible precisely and (2) not distributed uniformly. We propose two primitives: a "fuzzy extractor" reliably extracts nearly uniform randomness R from its input; the extraction is error-tolerant in the sense that R will be the same even if the input changes, as long as it remains reasonably close to the original. Thus, R can be used as a key in a cryptographic application. A "secure sketch" produces public information about its input w that does not reveal w, and yet allows exact recovery of w given another value that is close to w. Thus, it can be used to reliably reproduce error-prone biometric inputs without incurring the security risk inherent in storing them. We define the primitives to be both formally secure and versatile, generalizing much prior work. In addition, we provide nearly optimal constructions of both primitives for various measures of ``closeness'' of input data, such as Hamming distance, edit distance, and set difference.

Affiliated with

Also associated with

No associations

Rating

Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-699191