| 摘要 |
<p>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 configured to receive and process a print job, receive and validate a message comprising a command to increase the amount of dispensable material, and update the amount of dispensable material if the validation of the second message using the signature verification module and the encryption key succeeds. In another aspect, the chip may comprise a circuit with permanently and irreversibly changeable state and circuit components configured to ignore a command to increase a number tracking amount of dispensable material if the circuit has permanently and irreversibly changed its state to prevent responding to requests to increase the number.</p> |
