Patent ID: 7596531
Filing Date: 2009-09-29
Classification: G06F,G06Q

Abstract:
1. A method for private personal identification number (PIN) management in a secure portable device having (1) executable instructions stored therein and (2) a processor wherein execution of said executable instructions on said processor provides the method comprising: receiving, by said processor, a first PIN; receiving, by said processor, a first key; receiving, by said processor, a first scrambled PIN; creating, by said processor, a second scrambled PIN by scrambling said first PIN with a second key; storing, by said processor, said second scrambled PIN in a field in a memory of said secure portable device; marking, by said processor, a test field, in said memory, for said stored second scrambled PIN as untested; creating, by said processor, a third scrambled PIN by scrambling said first PIN with said first key; comparing, by said processor, said first scrambled PIN with said third scrambled PIN; and marking, by said processor, said test field for said stored second scrambled PIN based at least in part on said comparing said first scrambled PIN with said third scrambled PIN.