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Sovereign information sharing service

  • US 8,607,350 B2
  • Filed: 03/30/2006
  • Issued: 12/10/2013
  • Est. Priority Date: 03/30/2006
  • Status: Active Grant
First Claim
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1. A computer-implemented method for secure distributed query processing, comprising:

  • storing data tables from at least one data provider in at least one first computer comprising a sovereign server;

    performing encrypted input and output of said data tables between said server and a second computer;

    computing join operations, comprising determining whether arbitrary join predicates yield matches within said data tables;

    outputting encrypted results of said join operations,where said data tables include database relations A, B, C and D,where |A|=|C|, and |B|=|D|,where A and C have identical schema, and B and D have identical schema,where for any given maximum number of tuples from B that match a tuple from A, JAC, and JBD are ordered lists of server locations read and written by the sovereign server during the join of A with respect to C, and the joint of B with respect to D, respectively, andwhere JAC and JBD are identically distributed.

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