Method and apparatus in a wireless messaging system for controlling a hierarchical provision of service
US6259791A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/022
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A first service provider having a highest security of access, initially programs (604) tables in a subscriber unit (122), including an address table (224) having entries including addresses to which the subscriber unit is responsive, a sub-address table (226) including a sub-address identifier and a corresponding first pointer to a first decryption key for an algorithm required to decrypt a sub-message associated with the sub-address identifier, and a key table (228) including the first decryption key. A second service provider having a security of access less than that of the first service provider reprograms (606) an attribute of at least one of the sub-address table and the key table. The second service provider obtains reprogramming access by encrypting a first reprogramming message such that it can be properly decrypted using the first decryption key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.