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Secure function evaluation for a covert client and a semi-honest server using string selection oblivious transfer
US8990570B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8990570-B2 |
| Application number | US-201213562690-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 31, 2012 |
| Priority date | Jul 31, 2012 |
| Publication date | Mar 24, 2015 |
| Grant date | Mar 24, 2015 |
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Abstract
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Methods and apparatus are provided for secure function evaluation for a covert client and a semi-honest server using string selection oblivious transfer. An information-theoretic version of a garbled circuit C is sliced into a sequence of shallow circuits C 1 , . . . C n , that are evaluated. Consider any wire w j of C that is an output wire of C i , and is an input wire of C i+1 . When a slice C i is evaluated, C i 's 1-bit wire key for w j is computed by the evaluator, and then used, via string selection oblivious transfer (SOT), to obtain the wire key for the corresponding input wire of C i+1 . This process repeats until C's output wire keys are computed by the evaluator. The 1-bit wire keys of the output wires of the slice are randomly assigned to wire values.
First claim
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We claim: 1. A method for secure function evaluation between a client and a server, comprising: obtaining a circuit, C, representing a function, ƒ; preparing slices of said circuit, C, into a sequence of sub-circuits C 1 , . . . C l , wherein each of said sub-circuits C 1 , . . . C l comprises a fan-out-one circuit; executing an oblivious transfer of keys for said sub-circuits C 1 , . . . C l , to said client for evaluation, wherein input keys of one or more of said sub-circu…
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- What does patent US8990570B2 cover?
- Methods and apparatus are provided for secure function evaluation for a covert client and a semi-honest server using string selection oblivious transfer. An information-theoretic version of a garbled circuit C is sliced into a sequence of shallow circuits C 1 , . . . C n , that are evaluated. Consider any wire w j of C that is an output wire of C i , and is an input wire of C i+1 . When a slic…
- Who is the assignee on this patent?
- Kolesnikov Vladimir Y, Kumaresan Ranjit, Alcatel Lucent
- What technology area does this patent fall under?
- Primary CPC classification G09C1/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).