Proxy computing system, computing apparatus, capability providing apparatus, proxy computing method, capability providing method, program, and recording medium
US9607158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2011 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Nov 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/76
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than a certain probability and sets the result of the computation as z2, the computing apparatus generates a computation result u=f(x)bx1 from z1, generates a computation result v=f(x)ax2 from z2, and outputs ub′va′ if the computation results u and v satisfy a particular relation, where G and H are groups, f(x) is a function for obtaining an element of the group G for xεH, X1 and X2 are random variables having values in the group G, x1 is a realization of the random variable X1, and x2 is a realization of the random variable X2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.