System and method for encrypting and decrypting data

A system for encrypting and decrypting data being transmitted between a data processing device and a storage device, comprising:

• a password storing unit operable to store an initial password;
• an input unit operable to receive a current password in response to operations of a user;
• an authentication unit operable to determine if the current password matches with the initial password;
• a read unit operable to read the initial password and an identification number of the system;
• a key generator operable to generate an encrypting key and a corresponding decrypting key using the initial password and the identification number of the system;
• an encrypting unit operable to encrypt data being transmitted from the data processing device to the storage device using the encrypting key if the current password matches with the initial password;
• and
• a decrypting unit operable to decrypt data encrypted using the encrypting key and being transmitted from the storage device to the data processing device, using the decrypting key if the password matches with the initial password.