Caller ID verification using call identification and block lists
US10440178B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2019 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Mar 1, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/2005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an illustrative embodiment, a user device may block all the phone numbers used by an enterprise. When an enterprise wants to call the user, the enterprise may notify the user device through a separate secure channel that an enterprise phone number is in the process of making a phone call to the user device. The secure channel may include an authentication server that may request the user device to unblock the enterprise phone number. An incoming phone call from the enterprise phone number therefore can be trusted. After the phone call is terminated, the user device may again block the enterprise phone number. An attacker may not have access to the authentication server and a phone call from the attacker with a spoofed enterprise phone number (now blocked) may be dropped by the user device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.