Identification based on encrypted biometric data
First Claim
1. A management method for storing and indexing biometric data in a database in encrypted form, said database comprising a set of filters (B1, . . . , Bm) respectively associated with filter identifiers;
- wherein said management method comprises the following steps at a management unit;
/1/ receiving a biometric data item;
/2/ storing, at a given address in the database, said biometric data item in encrypted form;
/3/ obtaining keywords based on a first set of hash functions and on said biometric data item;
/4/ associating a subset of indexing filters with each keyword by selecting filters for each keyword as a function of the respectively associated filter identifiers, of said keywords, and of a second set of hash functions; and
/5/ associating said given address in encrypted form with each of the filters in the subset of indexing filters.
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Accused Products
Abstract
A database comprising biometric data stored in encrypted form is managed by a management unit. It comprises a set of filters respectively associated with filter identifiers. A biometric data item is received at a management unit; next, said biometric data item is stored in an encrypted form at a given address in the database. Then keywords are obtained on the basis of a first set of hash functions and of the biometric data item. A subset of indexing filters is associated with each keyword by selecting, for each keyword, filters as a function of the respectively associated filter identifiers, of said keywords, and of a second set of hash functions; and the given address is associated with each of the filters of the subset of filters.
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Citations
13 Claims
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1. A management method for storing and indexing biometric data in a database in encrypted form, said database comprising a set of filters (B1, . . . , Bm) respectively associated with filter identifiers;
- wherein said management method comprises the following steps at a management unit;
/1/ receiving a biometric data item; /2/ storing, at a given address in the database, said biometric data item in encrypted form; /3/ obtaining keywords based on a first set of hash functions and on said biometric data item; /4/ associating a subset of indexing filters with each keyword by selecting filters for each keyword as a function of the respectively associated filter identifiers, of said keywords, and of a second set of hash functions; and /5/ associating said given address in encrypted form with each of the filters in the subset of indexing filters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- wherein said management method comprises the following steps at a management unit;
Specification