The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2015
Filed:
Mar. 14, 2013
Emc Corporation, Hopkinton, MA (US);
Dimitrios Papadopoulos, Brighton, MA (US);
Nikolaos Triandopoulos, Arlington, MA (US);
Ran Canetti, Brookline, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Methods and apparatus are provided for authenticated hierarchical set operations. A third party server processes a query q (possibly from a client) on outsourced data sets S, . . . , Son behalf of a source of the data. The query q comprises a hierarchical set operation. Authenticated Set Operation techniques for flat set operations can be iteratively applied for hierarchical set operations. In addition, bilinear accumulators are extended to provide an extractable accumulation scheme comprising a primary bilinear accumulator and a secondary bilinear accumulator. In addition, a query q is parsed as a tree and for each tree node, a Union/Intersection argument is provided that is related to one or more accumulation values associated with the corresponding tree node. The client receives an answer to the query and a verification proof comprising, for example, subset witnesses, completeness witnesses, and/or accumulation values, but not necessarily intermediate results associated with the internal tree nodes of the query q.