SYSTEMS, METHODS AND APPARATUSES FOR AUTHORIZED USE AND REFILL OF A PRINTER CARTRIDGE

摘要

A chip for a cartridge with dispensable material may be provided. In one aspect, the chip may comprise a non-volatile memory for storing a number tracking amount of dispensable material in the cartridge, a key storage for storing an encryption key, a signature verification module and circuit components. The circuit components may be configured to receive and process a first message, receive and validate a second message, and update the amount of dispensable material if the validation of the second message succeeds. The first message may comprise a first command and an operation input value for a print job at the cartridge, and to process the first message may comprise decreasing the amount of dispensable material. The second message may comprise a second command to increase the amount of dispensable material, and may be validated using the signature validation module and the encryption key.

主权项

1. A chip for a cartridge with dispensable material, comprising:
a non-volatile memory for storing a number tracking amount of dispensable material in the cartridge; a key storage, the key storage storing an encryption key; a signature verification module; and circuit components configured to:
receive a first message comprising a first command and an operation input value for a print job at the cartridge;process the first message, comprising decreasing the amount of dispensable material in the cartridge;receive a second message comprising a second command to increase the amount of dispensable material;validate the second message using the signature validation module and the encryption key; andupdate the amount of dispensable material in the cartridge if the validation of the second message succeeds.