Process for the transmission and reception of personalized programs
US5301233A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 14, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Aug 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for the transmission and reception of personalized programs. The program is constituted by personalized program elements containing an identification of the recipient or addressee, the access to each program element being reserved for a single recipient and is conditioned for the possession of an access title covering the access criteria to the service and the possession of an individual identification on the part of each recipient. The access title control message enables users of the service to calculate, on the basis of the single cryptogram of a root control word and the identification of the recipient, all the personalized control words which will enable each recipient and him alone to descramble the elements relating to him.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.