Monolithic semiconductor device for preventing external access to an encryption key
US7165180B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2001 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Jan 31, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A monolithic semiconductor device having an encryption engine and encryption key register to store one or more encryption keys, where the contents of the encryption key register are observable, or can be made observable, only to internal components of the device is disclosed herein. The encryption key register can be implemented as an integrated or non-integrated volatile or non-volatile memory location. The monolithic semiconductor device can also include means for temporarily externally accessing and/or defining the contents of the key register during the manufacturing process and/or for a limited number of times after the manufacture and/or testing of the monolithic semiconductor device is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.