High Quality Content by WIKIPEDIA articles! Fuzzy extractors convert biometric data into random strings which makes it possible to apply cryptographic techniques to biometric security. They are used to encrypt and authenticate user's records with biometric inputs as a key. Historically, The first biometric system of this kind was designed by Juels and Wattenberg and was called Fuzzy commitment where cryptographic key is decommitted using biometric data. "Fuzzy" in that context implies the value close to the original can extract the committed value. Later, Juels and Sudan came up with Fuzzy vault schemes which is order invariant for the fuzzy commitment scheme but uses a Reed–Solomon code. Codeword is evaluated by polynomial and the secret message is inserted as the coefficients of the polynomial. The polynomial is evaluated for different values of a set of features of the biometric data. So Fuzzy commitment and Fuzzy Vault were per-cursor to Fuzzy extractors. Fuzzy extractor is a...