IC card and microprocessor
US6907526B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 5, 2001 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Apr 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/7219
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are an IC card and a microcomputer which have implemented the strengthening of security and the speeding up and enhancement of signal processing for the security. In an IC card, which is supplied with an operating voltage by an electrical connection between each of external terminals and a read/write device, and includes an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current. In a microcomputer having a module configuration including an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.