Cryptographic processing method and system using a sensitive data item
US9210134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2014 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Feb 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2133
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic processing method using a sensitive data item in a cryptographic processing system including in memory a test making it possible to tell a human and a computer apart and a reference value obtained by applying a cryptographic function to a pair of values P and R, where P is the sensitive data item and R is a solution to the memorized test, the method including the steps of: configuring the cryptographic processing system, including obtaining and memorizing the reference value in the cryptographic system; transmitting the memorized test to a user; obtaining the user's response to the transmitted test; a cryptographic processing step based on the sensitive data item, using the obtained response, the reference value and the cryptographic function. The reference value and memorized test are in the memory of the system and the solution is not in the memory of the system, during the transmission step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.