Cryptographic processing method and cryptographic processing device
US9871652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2015 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Aug 20, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09C1/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A computer generates a third encrypted polynomial that corresponds to a result of encrypting a third polynomial by use of a result of multiplying a first encrypted polynomial by a second encrypted polynomial, and outputs cryptographic information that represents the third encrypted polynomial. The first encrypted polynomial is a polynomial obtained by encrypting a first polynomial that corresponds to a first vector, and the second encrypted polynomial is a polynomial obtained by encrypting a second polynomial that corresponds to a second vector. The third polynomial includes a first term that has a coefficient based on an inner product of the first vector and the second vector and a second term other than the first term, in which a coefficient of the second term is masked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.