Patent ID: 8098819

Claim:
Method for data archiving with automatic encryption and decryption comprising: at a storing of unencrypted data ( 9 , 10 ) at a client station ( 1 ), transmitting said unencrypted data from said client station to a securing unit ( 2 ), encrypting said unencrypted data at said securing unit with a first key ( 6 ) and a second key ( 7 ); transmitting said encrypted data from said securing unit to an archive station ( 4 ); at a retrieval of said encrypted data transmitting said encrypted data from said archive station to said securing unit; decrypting said encrypted data at said securing unit with said first and second keys; transmitting said decrypted data from said securing unit to said client station; and swapping out said second key between said encryption and decryption steps at least temporarily and deleting said second key locally in the securing unit; and wherein a composing key ( 5 ) is formed from at least the first and second keys and the encryption and decryption is in each case carried out using the composed key.