Image processing apparatus, control method therefor and storage medium

An image processing apparatus capable of operating in any of a first power mode in which power is supplied to both a first control unit and a second control unit, and a second power mode in which power is supplied to the second control unit and is not supplied to the first control unit, and capable of executing security communication with an external apparatus, the second control unit comprising:

• first holding means for holding security information relating to the security communication;
• receiving means for receiving a packet transmitted from the external apparatus;
• storage means for storing the security information held by the first holding means, in a case where a packet transmitted from the external apparatus is received by the receiving means;
• updating means for updating the security information held by the first holding means, after the security information is stored by the storage means;
• determination means for, in a case where the image processing apparatus is in the second power mode, determining whether to transition the image processing apparatus from the second power mode to the first power mode based on the packet received by the receiving means;
• and
• processing means for, in a case where it is determined by the determination means to transition the image processing apparatus from the second power mode to the first power mode, transitioning the image processing apparatus from the second power mode to the first power mode, and transferring to the first control unit the security information stored by the storage means and not transferring to the first control unit the security information updated by the updating means.

A control method for an image processing apparatus capable of operating in any of a first power mode in which power is supplied to both a first control unit and a second control unit, and a second power mode in which power is supplied to the second control unit and is not supplied to the first control unit, the method comprising, with the second control unit:

• receiving a packet transmitted from an external apparatus;
• copying and storing the received packet;
• analyzing a header of the received packet, and delete the analyzed header;
• in a case where the image processing apparatus is in the second power mode, determining whether to transition the image processing apparatus from the second power mode to the first power mode based on a result of the analysis;
• and
• in a case where it is determined to transition the image processing apparatus from the second power mode to the first power mode, transitioning the image processing apparatus from the second power mode to the first power mode, and transferring to the first control unit the received packet that was stored and not transferring to the first control unit the received packet from which the header was deleted.

A control method for an image processing apparatus capable of operating in any of a first power mode in which power is supplied to both a first control unit and a second control unit, and a second power mode in which power is supplied to the second control unit and is not supplied to the first control unit, and capable of executing security communication with an external apparatus, the method comprising, with the second control unit:

• holding security information relating to the security communication;
• receiving a packet transmitted from the external apparatus;
• storing the held security information, in a case where a packet transmitted from the external apparatus is received;
• updating the held security information, after the security information is stored;
• in a case where the image processing apparatus is in the second power mode, determining whether to transition the image processing apparatus from the second power mode to the first power mode based on the received packet;
• and
• in a case where it is determined to transition the image processing apparatus from the second power mode to the first power mode, transitioning the image processing apparatus from the second power mode to the first power mode, and transferring to the first control unit the security information that was stored and not transferring to the first control unit the security information that was updated.