Personal identification number security system incorporating a time dimension
US5721765A · kind A · utility
59Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M15/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The security system includes a time dimension in an alpha-numeric personal identification number (PIN) security system to enhance its security yet maintain the familiar and simple to use PIN system. The alpha-numeric digits comprising the PIN are separated into two or more digit groups that must be entered into the system according to a predefined time sequence in order to positively identify the user and provide security clearance. The time sequence can include time delays between the entry of digit groups or time periods during which the digit groups must be entered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.