Information processing apparatus, software updating method, and image processing apparatus

A software updating method of an information processing apparatus which updates software in the apparatus, comprising:

• a storing step of storing a value uniquely calculated from the software;
• an encrypting step of encrypting information by using the value;
• a decrypting step of decrypting the encrypted information by using the value;
• an authenticating step of authenticating a software updating file;
• an updating step of updating the software by using the authenticated software updating file;
• and
• a controlling step of controlling encrypting again the information encrypted by the value by using a value which is changed based on the update of the software.

An image processing apparatus which includes a plotting section and a scanning section and updates software in the apparatus, comprising:

• an encryption and decryption unit which stores a value uniquely calculated from the software and encrypts information by using the value and decrypts the encrypted information by using the value;
• an authenticating unit which authenticates a software updating file;
• a software updating unit which updates the software by using the authenticated software updating file;
• and
• an encryption key managing unit which controls encrypting again the information encrypted by the value by using a value which is changed based on the update of the software.