Cellular telephone authentication system using a digital certificate
US5884158A · kind A · utility
14Cited by
22References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2215/32
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This invention relates to a cellular telecommunications systems that utilizes the telephone number the cellular telephone is calling, with the number of telephone calls placed on that cellular telephone, i.e., call count and a seed number to create a digital certificate of the data. The digital certificate is used to make it more difficult to make unauthorized cellular telephone calls. The seed number may be changed after a predetermined number of calls has been made, i.e. one hundred, one thousand, etc. Thus, the transmission of seed numbers between data centers would be substantially reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.