Patent ID: 7177425

Claim:
A device, used in a communication apparatus, for securing an information associated with a subscriber, said communication apparatus comprising a cipher-key generating module for generating a cipher key, said device comprising: a storage module, which the information associated with the subscriber, is stored in; a cipher-key acquiring module for transmitting an input to the cipher-key generating module, and then receiving the cipher key generated by the cipher-key generating module in response to the input; an encrypting module for retrieving the cipher key through the cipher-key acquiring module, retrieving the information associated the subscriber from the storage module, and encrypting the information associated with the subscriber using the cipher key to generate an encrypted information, wherein after generated, the encrypted information is stored in the storage module and replaces the information associated with the subscriber stored in the storage module; and a decrypting module for retrieving the cipher key through the cipher-key acquiring module, retrieving the encrypted information from the storage module, and decrypting the encrypted information using the cipher key to recover the information associated with the subscriber when the information associated with the subscriber needs to be used, and wherein when the decrypting module retrieves the cipher key through the cipher-key acquiring module, the cipher-key acquiring module transmits the input once more to the cipher-key generating module, and then receives the cipher key generated once more by the cipher-key generating module in response to the input.