Process for storage and use of sensitive information in a security module and the associated security module
US6658566B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1998 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Dec 11, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a process for storing and using sensitive information in a security module and to a security module arranged to implement the process, and protect the sensitive information against fraudulent utilization. The sensitive information ISj is stored in a form {overscore (ISj)} encrypted using a temporary encrypting protection key CPi, whose content varies over time. The sensitive information {overscore (ISj)} is decrypted before being used in a given operation, using a temporary decrypting protection key CPid. Before the contents of the encrypting and decrypting keys are varied, the sensitive information {overscore (ISj)} is decrypted with the current decrypting key, and then it is re-encrypted with the new encryption key to obtain a new encrypted form, different from the previous one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.