Method of writing information securely in a portable medium
US5900606A · kind A · utility
89Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1996 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/3558
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of writing information securely in a portable information medium fitted with a firmware electronic component. According to the invention, information is written in at least two stages on at least two distinct sites, with information depending on the chosen second site being written in a first step at the first site, and with information necessary for operation of medium being written in a second step at the second site. Application to protecting portable media for electronic transactions against theft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.