Patent ID: 9210134
Filing Date: 2015-12-08
Classification: G06F,H04L

Abstract:
1. Method of cryptographic processing using a sensitive data item (P) in a cryptographic processing system comprising in memory a test making it possible to tell a human and a computer apart (ChallR) as well as a reference value (Co) obtained by applying a cryptographic function (F) to a pair of values P and R, where P is said sensitive data item and R is a solution to the memorized test (ChallR), said method comprising: a step of configuration (E a step of transmission (E a step of obtaining (E a step of cryptographic processing (E said method being characterized in that said reference value (Co) and said test (ChallR) are in the memory of said cryptographic processing system and said solution (R) is not in the memory of said cryptographic processing system, during said transmission step (E