ONION LAYER ENCRYPTION SCHEME FOR SECURE MULTI-ACCESS WITH SINGLE CARD

摘要

A magnetic strip card (12) includes a partial encrypted card payload encrypted with a long term shared key (LK) to provide a final encrypted payload. A method for encoding the magnetic strip card includes encrypting a card payload, the card payload comprising a code key (32a; 32b) of an access control (16; 16a; 16b) with a short key (SKI; SK2) of the access control to generate a partial encrypted payload and encrypting the partial encrypted payload with a long term shared key (LK) to provide a final encrypted payload.