Semiconductor integrated circuit having encrypter/decrypter function for protecting input/output data transmitted on internal bus
US8249253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2002 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Nov 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A semiconductor integrated circuit is provided, which includes: a first circuit; a second circuit; a data BUS; and first and second encryption/decryption circuits for encrypting/decrypting data transmitted between the first and second circuits on the data bus. The first encryption/decryption circuit is for encrypting data output from the first circuit, outputting the encrypted data to the data BUS, decrypting an encrypted data received from the second encryption/decryption circuit, and providing the decrypted data to the first circuit. The second encryption/decryption circuit is for decrypting the encrypted data received from the first encryption/decryption circuit, providing the decrypted data to the second circuit, encrypting data output from the second circuit, and outputting the encrypted data to the data BUS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.