Information processing apparatus with replaceable security element
US5111504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4367
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A field upgradeable security system deciphers signals received from a communication network. An information processor includes a receptacle for receiving a replaceable security element. The replaceable security element generates a working key necessary to the operation of the information processor. The working key is communicated to the information processor encrypted under a secret key. The information processor decrypts the encrypted working key for use in deciphering a received communication signal. Additional layers of encryption can be added to the communications between the information processor and security element to increase the level of security.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.