Security enhancement in a data processor through use of dynamic parameter authentication
US5151938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1990 |
| Grant date | Sep 29, 1992 |
| Priority date | — |
| Expiry date | Mar 13, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A descrambler for descrambling scrambled information signals through use of a predetermined decryption key. The processing means are adapted for processing data in accordance with a number of different data processing routines to descramble said scrambled information signals, including a routine for descrambling said scrambled information signals that utilizes said predetermined decryption key, and a routine for generating said predetermined decryption key. The processing means includes means for responding to an instruction for generating said predetermined decryption key by processing a first signal provided by the processing means with a second signal to generate said predetermined decryption key; and means for providing at least a portion of said second signal for processing with said first signal by retrieving a portion of said stored data from a portion of said memory means identified by a dynamic pointer contained in said instruction for generating said decryption key, with said retrieved data being data that is also used in a said data processing routine other than said routine for generating said predetermined decryption key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.