Hewlett-packard Development Company, L.P.

Kyle Michel

Jefferson Patrick Ward

Stephen D Panshin

Paul L Jeran

David B Novak

Gabriel Scott McDaniel

Laurent Pizot

Steven T Castle

Honee L Mesa

Elijah Houle

Kyle Mannari

Lee Jackson

Teresa M O'keeffe

A logic circuitry package for a print apparatus includes a serial data bus interface to interface with a serial data bus, the logic circuit to respond to messages from the print apparatus over the serial data bus directed to a number of different addresses using different component keys for cryptographic authentication corresponding to each different address, the different component keys related to at least one master key of the print apparatus. The logic circuitry package further includes control logic which, in response to a session initiation request message on the serial data bus from the print apparatus, is to establish a secure communication session related to one of the different addresses, the control logic to cryptographically authenticate responses to each subsequent message of the secure communication session from the print apparatus using a component key corresponding to the address.

Logic circuitry package for print apparatus

Reprocessing of a replaceable supply component may include receiving from an encoding device and using an interface communicatively coupled to the encoding device, a request blob to reprocess a replaceable supply component. The method may include in response to cryptographically verifying the request blob, extracting from the request blob, a supply identifier and raw supply data. The method further includes using the supply identifier and raw supply data, generating a reprocess structure to append or amend original manufacturing data for the replaceable supply component, and providing a response blob to the encoding device, to designate the replaceable supply component as a reprocessed supply component.

Reprocessing of a replaceable supply component

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Vancouver, WA, United States of America

Kyle Michel