Privacy enhanced comparison of data sets

Details Privacy enhanced comparison of data sets Privacy enhanced comparison of data sets

2011-07-05

2011-07-05

Smithers, Matthew B (Department: 2437)

Cryptography

Particular algorithmic function encoding

C707S687000, C707S698000

Reexamination Certificate

active

07974406

ABSTRACT:
A computer implemented method for performing a privacy enhanced comparison of a plurality of data sets includes allocating a private encryption key to each of the data sets; performing an encryption operation for each of the data sets, the encryption operation comprising generating a commutatively encrypted data set of the respective data set, wherein the commutatively encrypted data sets are generated by successively applying a keyed commutative encryption function on the respective data set with the private encryption key of the respective data set itself and with the private encryption keys of the other data sets; and comparing the commutatively encrypted data sets.

REFERENCES:
patent: 7054891 (2006-05-01), Cole
patent: 7698250 (2010-04-01), Dwork et al.
patent: 7734598 (2010-06-01), Noguchi et al.
patent: 7747582 (2010-06-01), Kaminski, Jr.
patent: 2004/0148506 (2004-07-01), Prince
patent: 2009/0193249 (2009-07-01), Conrado et al.
PCT Search Report PCT/IB2007/054449 Mailed Jun. 2, 2008.
Rakesh Agrawal et al.; “Information Sharing Across Private Databases;” SIGMOND 2003, Jun. 9-12, 2003; pp. 86-97.

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