Method for authenticating an OTP and an instrument therefor
US9178875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jul 8, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3228
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for authenticating an OTP (one time password) and an instrument therefor, in which the method includes determining whether the OTP token is authenticated successfully, if the OTP token is not authenticated successfully, setting size of an authentication window to be a first predetermined time length and authenticating the obtained OTP according to the authentication window; if the OTP token is authenticated successfully, determining whether the interval between the authentication success time and the current system time is longer than a second predetermined time length, if yes, setting size of the authentication window to be a third predetermined time length and authenticating the obtained OTP according to the authentication window and the authentication success time, in which the third predetermined time length is shorter than the first predetermined time length; otherwise, setting size of the authentication window to be a fourth predetermined time length and authenticating the obtained OTP according to the authentication window and the authentication success time, in which the fourth time length is shorter than the third predetermined time length. The invention can ensur…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.