Method and system for hash string extraction from biometric data
First Claim
Patent Images
1. A method of hash string extraction from biometric information comprising the steps of:
- providing a biometric information sample;
extracting features from the biometric information sample and encoding symbols indicative of characteristics of the features;
generating a string of the symbols indicative of the extracted features;
determining a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features; and
hashing strings from the plurality of error strings of symbols to produce a hash value for comparison with a stored hash value.
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Abstract
A method of hash string extraction from biometric information is disclosed. The method comprises the steps of providing a biometric information sample in the form of a fingerprint for example, extracting features from the biometric information sample and encoding the features based on their location within the biometric information sample; and, generating a string of values based on the extracted features and their determined locations. The method further comprises the steps of hashing the string of symbols to produce a plurality of hash values for comparing the plurality of hash values against a stored hash value for identifying a user.
64 Citations
62 Claims
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1. A method of hash string extraction from biometric information comprising the steps of:
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providing a biometric information sample; extracting features from the biometric information sample and encoding symbols indicative of characteristics of the features; generating a string of the symbols indicative of the extracted features; determining a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features; and hashing strings from the plurality of error strings of symbols to produce a hash value for comparison with a stored hash value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of string extraction from biometric information for authorizing access comprising the steps of:
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providing a biometric information sample to a contact imager for imaging the biometric information sample wherein the contact imager comprises a platen disposed for accepting a biometric information source thereon; processing the imaged information by extracting features therefrom and encoding symbols based on at least an extracted feature location within the biometric sample; determining a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features; hashing strings from the plurality of error strings of symbols to produce a hash value for comparison with a stored hash value; and comparing the hash value determined from the error strings of symbols with the stored hash value to determine a match, wherein upon a match access is provided. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A system that provides hash string extraction from biometric information, comprising:
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a contact imager that images a biometric information sample to provide biometric image data; and a processor that processes the biometric image data to extract features therefrom, to encode symbols indicative of characteristics of the features, to generate a string of the symbols indicative of the extracted features, to determine a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features, and to hash strings from the plurality of error strings of symbols to produce a hash value for comparison with a stored hash value. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A system that provides string extraction from biometric information for authorizing access, comprising:
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a contact imager having a platen disposed for accepting a biometric information source thereon for imaging the biometric information sample to provide biometric image data; and a processor that processes the biometric image data to extract features therefrom, to encode symbols based on at least an extracted feature location within the biometric sample, to determine a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features, to hash strings from the plurality of error strings of symbols to produce a hash value, and to compare the hash value determined from the error strings of symbols with a stored hash value to determine a match, wherein upon a match access is provided. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A computer readable medium having computer executable instructions stored thereon that when processed by a processor causes the processor to provide hash string extraction from biometric information, the computer executable instructions comprising:
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computer executable instructions that image a biometric information sample to provide biometric image data; and computer executable instructions that process the biometric image data to extract features therefrom, encode symbols indicative of characteristics of the features, generate a string of the symbols indicative of the extracted features, determine a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features, and hash strings from the plurality of error strings of symbols to produce a hash value for comparison with a stored hash value. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A computer readable medium having computer executable instructions stored thereon that when processed by a processor causes the processor to provide hash string extraction from biometric information, the computer executable instructions comprising:
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computer executable instructions that image a biometric information sample to provide biometric image data; and computer executable instructions that process the biometric image data to extract features therefrom, encode symbols based on at least an extracted feature location within the biometric sample, determine a plurality of error strings of symbols each representing a set of error features within a predetermined error range from the extracted features, hash strings from the plurality of error strings of symbols to produce a hash value, and compare the hash value determined from the error strings of symbols with a stored hash value to determine a match, wherein upon a match access is provided. - View Dependent Claims (58, 59, 60, 61, 62)
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Specification