Partitioned information storage systems with controlled retrieva

Details Partitioned information storage systems with controlled retrieva Partitioned information storage systems with controlled retrieva

1996-07-19

1999-09-21

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 9, 380 23, 380 25, 380 28, 380 30, 380 49, 380 50, 707 1, 395186, H04L 900, H04L 930, G06F 1730

Patent

active

059564008

ABSTRACT:
An information storage system includes one or more information update terminals, a mapper, one or more partial-databases, and one or more query terminals, exchanging messages over a set of communication channels. An identifier-mapping mechanism provides (to an update terminal) a method for delegating control over retrieval of the data stored at the partial-databases to one or more mappers, typically operated by one or more trusted third parties. Update terminals supply information, that is stored in fragmented form by the partial-databases. Data-fragment identifiers and pseudonyms are introduced, preventing unauthorized de-fragmentation of information--thus providing compliance to privacy legislation--while at the same time allowing query terminals to retrieve (part of) the stored data or learn properties of the stored data. The mapper is necessarily involved in both operations, allowing data access policies to be enforced and potential abuse of stored information to be reduced. Introduction of multiple mappers acts to distribute information retrieval control among multiple trusted third parties. Introducing so-called `groupers` increases the efficiency of data retrieval for a common set of queries and further reduces potential abuse of information.

REFERENCES:
patent: 4949380 (1990-08-01), Chaum
patent: 4996711 (1991-02-01), Chaum
patent: 5065429 (1991-11-01), Lang
patent: 5191611 (1993-03-01), Lang
patent: 5224162 (1993-06-01), Okamoto et al.
patent: 5420926 (1995-05-01), Low et al.
Chaum "Untraceable Electronic Mail, Return Addresses, and Digotal Pseudonyms", Communications Of The ACM, Feb. 1981, vol. 24, No. 2.

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