METHOD FOR GENERATING A PAIR OF TERMINAL ASSOCIATED KEYS USING A TERMINAL AND A GATEWAY, A METHOD FOR SECURE DATE EXCHANGE USING THE METHOD, A TERMINAL AND A GATEWAY

摘要

The invention is directed to a method for generating a pair of terminal associated keys comprising the steps of: providing (S100) on a home gateway (10) a pair of gateway associated keys comprising a public gateway key (Pub-G) and a private gateway key (Pr- G), providing (S110) on a terminal (20) a terminal associated and symmetric first terminal key (T-1) and accessing the public gateway key (Pub-G) and generating (S120) a second terminal key (T-2) by encrypting the first terminal key (T-1) with the public gateway key (Pub-G) on the terminal (20). In a further step (S130), the second terminal key (T-2) is transferred from the terminal (20) to the gateway (10) and a pair of terminal associated keys comprising a public terminal key (Pub-T) and a private terminal key (Pr-T) on the gateway (10) are generated (S140). The invention further includes the steps of generating (S150) an encrypted private terminal key (ePr-T) by encrypting the private terminal key (Pr-T) with the first terminal key (T-1) on the gateway (10), transferring (S160) the public terminal key (Pub-T) and the encrypted private terminal key (e Pr-T) to the terminal (20); and decrypting (S170) the encrypted private terminal key (ePr-T) with the first terminal key (T-1) and then with the public terminal key (Pub-T).