|1. A Customer Replaceable Unit Monitoring (CRUM) chip operable to communicate with an image forming device, the CRUM chip
an interface including at least one contact and operable to receive first data and first integrity detection data regarding
the first data that is transmitted from a main controller of the image forming device connecting with the at least one contact
of the interface;
a controller that is operable to generate second integrity detection data using both second data to be transmitted to the
main controller of the image forming device and the first integrity detection data, and that is operable to transmit the second
data and the second integrity detection data from the CRUM chip to the main controller of the image forming device.