1. A management process for a database comprising biometric data stored in encrypted form, said database comprising a set of filters (B1,. .. , Bm) respectively associated with filter identifiers; wherein said process 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.