Secure, easy and/or irreversible customization of cryptographic device
US6981149B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Feb 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention enables a cryptographic device to be easily, securely and/or irreversibly customized to provide specified cryptographic functionality. For example, the invention can enable easy and secure modification (expansion, reduction or changing) of application code (which interacts with code stored on a cryptographic device) via the exposure of, for example, the mathematical primitive operations available on the cryptographic device. In particular, the invention can enable modification of available cryptographic operations at a relatively high level of programming abstraction, thus enabling such modification to be accomplished relatively easily. Further, the invention can enable the modification to be accomplished in a manner that does not necessitate or allow access by the application developer to other operations of the cryptographic device, thus providing security for the proprietary code and/or cryptographic keys of other persons or entities that may be present on the cryptographic device. The invention can also enable specification of permissible cryptographic characteristics of a cryptographic device from a set of available cryptographic characteristics of the cryptograp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.