Computer architecture for a handheld electronic device with a shared human-machine interface
US7779252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Feb 3, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Mobile PDA computer system (300) includes a secure user processor (302), a non-secure user processor (306), a cryptographic engine (304), and a shared human/machine interface (HMI) (308). The secure user processor (302) can be comprised of a first trusted microprocessor and a first trusted operating system executing on the first trusted microprocessor. The non-secure user processor (306) can be comprised of a second non-trusted microprocessor and a second non-trusted operating system executing on the second non-trusted microprocessor. A cryptographic engine (304) can be comprised of a third trusted cryptographic processor and a third trusted operating system executing on the third trusted cryptographic processor. The cryptographic engine can be configured for encrypting and decrypting data. A first data communication link (303) communicates data between the secure user processor and the cryptographic engine. A second data communication link (305) communicates data between the cryptographic engine and the non-secure user processor. In this way, the cryptographic engine forms a bridge between the secure user processor and the non-secure user processor. An HMI (308) comprised of trust…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.