Authentication system and an authentication method for authenticating mobile information terminals
US7526646B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2002 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Apr 11, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/77
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An authentication system for authenticating a mobile information terminal is disclosed. The system includes elements for: issuing a user ID to the terminal upon program issuing receipt therefrom; generating a random number based on the user ID and a time of issuing request receipt; registering the random number and the time of receipt in conjunction with the user ID; generating a first program for creating a first image embedded with the user ID, in accordance with the random number, user ID and time of receipt; transmitting the first program to the terminal; picking up the first image displayed on the terminal; recognizing first information from the picked-up first image while extracting the user ID from the same image concurrently; retrieving the registered random number and time of receipt in keeping with the user ID; generating a second program for creating a second image based on the retrieved random number, time of receipt, and user ID; and authenticating the terminal by verifying a match between second information from the second image generated by execution of the second program on the one hand, and the recognized first information on the other hand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.