Smartcard adapted for a plurality of service providers and for remote installation of same
US5544246A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0853
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A smartcard that allows different Service Providers to coexist on the smartcard with none of the Service Providers, nor the owner of the smartcard, having access to the files created for, or by, each of the resident Service Providers. The operating system of the smartcard includes a root directory that is owned by the smartcard's issuer/owner, and each Service Provider is a "user" that is installed by the issuer/owner. Each such user is provided with a subdirectory of the root directory, and within the subdirectory the user creates files and subdirectories with files, as the user deems necessary. The operating system prevents all users of the smartcard, including the smartcard's issuer/owner and the smartcard's holder, from accessing any files that are owned by any other user, when that user chooses to prevent such access. This power to exclude is effected through a password file that is owned by the user and which cannot be altered by any other user, including the smartcard's issuer/owner. Optionally, the smartcard's issuer/owner is given the power to erase all files of a given user. Connection is effected with a protocol which authenticates all parties to the connection. Thus, in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.