Access control system, apparatus, and program
US8456659B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 9, 2012 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Mar 9, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a deriving operation control device obtains derivation control information and a derivation attribute. A deriving operation propriety determination unit extracts the number of times of previously-performed derivation from the derivation attribute. The deriving operation propriety determination unit extracts the upper limit number of times enabling derivation from the derivation control information and determines that a deriving operation is possible when the number of times of previously-performed derivation is equal to or below the upper limit number of times enabling derivation. A deriving operation execution unit executes the deriving operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.