Patent ID: 7362869

Claim:
A method of distributing the public key of an asymmetric key pair with a private key and the public key from a mobile station to a key managing computer, the method comprising the steps of: communicating a password (OTP) from the key managing ( 203 ) computer to the mobile station ( 209 ) of a registered user ( 201 ) by means of a secure channel ( 202 ) to thereby provide a shared secret; at the mobile station and at the key managing computer, generating a first code (MAC 1 ) and a second code (MACT 1 ), respectively, based on the same predefined generation method, which codes (MAC 1 ; MACT 1 ) are generated from the password (OTP); by means of the mobile station ( 209 ), transmitting the public key and the first code (MAC 1 ) to the key managing computer ( 203 ); at the key managing computer ( 203 ), receiving the public key and the first code (MAC 1 ) from the mobile station ( 209 ); checking the authenticity of the registered user ( 201 ) based on comparing the first code (MAC 1 ) and the second code (MACT 1 ).