×

Method of securely loading commands in a smart card

  • US 6,073,238 A
  • Filed: 03/28/1997
  • Issued: 06/06/2000
  • Est. Priority Date: 03/29/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of securely loading a command or commands in a smart card by a first party, the smart card being issued by a second party, the method comprising the steps of:

  • the second party producing a first authentication code using a first key,a third party producing a second authentication code using a second key,the first party obtaining the first and second authentication codes from the second party and the third party, respectively,the first party transferring command modifications with the obtained first and second authentication codes to the smart card,the smart card validating the command modifications by obtaining a replica of the first and second authentication codes using stored versions of the first and second key, respectively, and comparing the replica of the first and second authentication codes with the obtained first and second authentication codes transferred with the command modifications from the first party to the smart card.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×