Verification method, consumable chip, consumable and image forming device

Abstract

The invention relates to the technical field of image forming, in particular to a verification method, a consumable chip, a consumable and an image forming device, and the validity of the consumable chip can be accurately verified. The method comprises the steps that the consumable chip responds to a first request and sends a first feedback message to the image forming device; wherein the first feedback message carries digital certificate information, and the digital certificate information at least comprises a first public key; the first public key is generated based on a unique hardware identifier PUF ID of the consumable chip; the consumable chip receives an identity inquiry message sent by the image forming device; the identity inquiry message comprises a first encryption result, and the first encryption result is obtained by encrypting the first random number by using a first public key; the first random number is generated by the image forming device; the consumable chip decrypts the first encryption result by using a first private key to obtain a second random number; the second random number is used for obtaining a verification result of the consumable chip.

Description

technical field [0001] The present application relates to the technical field of image formation, in particular to a verification method, a consumable chip, a consumable and an image forming device. Background technique [0002] Currently, consumables such as toner cartridges, ink cartridges, and toner cartridges are generally detachably installed in image forming devices such as printers as consumable products. A consumable chip is installed on the consumable. After the consumable is installed in the image forming device, the image forming device will detect the consumable chip before using the consumable to perform imaging operations such as printing or copying, so as to determine whether the consumable is a legitimate consumable, such as whether it is an original consumable. Or whether it is a legal compatible consumable, etc., the consumable will start to use the consumable for imaging after passing the test. The conventional method for detection is that the controller ...

AI Technical Summary

Problems solved by technology

[0003] During the implementation of the above solution, the inventor found that due to the influence of the electrostatic field in the image forming device and the contact conditions (such as the size, shape, material) between the image forming device and the consumable chip, the image forming The communication between the device and consumables is often disturbed, making the reliability of the response signal returned by the consumable chip less reliable. For example, in the case of communication interference, the time of the response signal returned by the consumable chip may be delayed, resulting in image formation The device mistakenly identifies legitimate consumable chips as illegal, or recognizes illegal consumable chips as legitimate; on the other hand, the protection measures for communication between the consumable chip and the image forming device are relatively weak, and the response signal is easily intercepted by imitators , imitating the original chip to send a response signal, so that the non-original consumables are recognized as original

The use of illegal consumables such as non-original consumables may damage the image forming device or reduce the image quality, affecting user experience

Images