Method for performing a double-signature secure electronic transaction
US6105862A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 29, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Oct 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/0826
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A method for performing electronic transactions between a card, a service provider having at least one terminal configured to accept the card and a centralized system configured to be connected to the terminal. The terminal transmits to the card a parameter M including the sum of the transaction and its identity. The card produces two signatures, a first signature (z) depending on a secret debit key (k) and on the parameter (M), this first signature being a proof that the card balance has been debited; and a second signature (y) depending on the first signature (z), the second signature being produced either by an RSA algorithm or by an interactive algorithm. The terminal checks the second signature (y) but not the first one because it is unable to recover the secret debit key (k). The terminal stores the different first signatures (proofs) (z) and the parameters (M) for the different transactions. The centralized system can collect the first signatures and the parameters. The centralized system can recover the secret debit key (k) based on the card identities and can credit the service provider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.