Method of securely modifying data on a smart card
US5856659A · kind A · utility
31Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1997 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Mar 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/082
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of securely transferring data, such as program data, to a smart card (1) is disclosed. In order to be applicable in non-secure environments, the method of the invention involves a one-way authentication mechanism, comprising the use of a series of interrelated authentication values (R0, R1, R2, . . . ). Further security is achieved by using commands (INIT, TRAN) which are each provided with an authentication code (MAC0, MAC1, . . . ). In order to transfer data only to selected cards, the card may accept transfer commands only if a card profile (CP) matches a distribution profile (DP).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.