Method for preventing cellular telephone fraud
US5991617A · kind A · utility
64Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1996 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Mar 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/79
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of identifying the fraudulent use of a cellular telephone includes the step of identifying an initial call made from the cellular telephone. An automated challenge-response authentication operation is then executed with a rotating subscriber query, resulting in a first authentication failure. In response to the first authentication failure, an operator assisted escalated challenge-response authentication operation is performed with a rotating subscriber query to generate a second authentication failure, indicating the fraudulent use of the cellular telephone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.