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US 9,961,234 B1Granted
Replaceable item authentication
AssigneeHewlett-Packard Development Company, L.P.
InventorsStephen D. Panshin, Jefferson P. Ward, Erik D. Ness
Life of this patent
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Abstract
A replaceable item for a host device, such as a print substance cartridge for a printing device, stores multiple identities. For each identity, the replaceable item stores multiple authentication values, or passwords. The replaceable item selects an identity, and in response to a request for an authentication value from the host device, sends the requested authentication value for the selected identity.
Claims13
A method comprising:
- prior to a replaceable item receiving a request for an identity of the replaceable item from a host device to which the replaceable item has been connected, and in response to the replaceable item receiving a request for an authentication value from the host device, selecting, by the replaceable item, the identity from a plurality of replaceable item identities stored within the replaceable item, the replaceable item storing a plurality of authentication values for each replaceable item identity, the identity selected as one of the replaceable item identities for which the replaceable item stores the requested authentication value;
- and
- after selecting the identity, sending, by the replaceable item, the requested authentication value for the selected identity to the host device.
A print substance cartridge for a printing device, comprising:
- a supply of print substance for the printing device;
- a non-volatile memory storing a plurality of cartridge identities, and for each identity a plurality of passwords;
- and
- logic to, at power on of the cartridge, assume as an identity of the cartridge to use for authentication the cartridge identity that the logic assumed prior to the power on if the cartridge was successfully authenticated with the cartridge identity that the logic assumed prior to the power on.
1 more element
Dependencies are inferred from the claim text.