Authentication server, authentication method and authentication program
US8141146B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Oct 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Upon receipt of a service use request from a client, an authentication server device reads one or more image information pieces from an image information storage storing multiple image information pieces each containing one or more known symbols, one or more dummy symbols, or both of them, and thereafter creates challenge data using the one or more read image information pieces so that one or more two-dimensional images each containing one or more of the known symbols and one or more two-dimensional images each containing one or more of the dummy symbols can be presented to the user of the client, one image at a time. Upon receipt of response data, the authentication server device judges whether or not the received response data matches the one or more known symbols contained in the challenge data, and approves the service use of the client device if the match is confirmed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.