公开(公告)号：US20190042751A1

公开(公告)日：2019-02-07

申请号：US16073022

申请日：2016-05-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Marvin D Nelson ,  Honee L Mesa ,  Paul Jeran ,  Chris R Gunning ,  Erik D Ness

IPC: G06F21/57 ,  G06F8/65

Abstract: Examples associated with firmware encryption are described. One example device firmware includes a base module. The base module controls a base function of the device. The device firmware also includes a first encrypted module that modifies a first function of the device. The first encrypted module is inactive until decrypted. A decryption module decrypts the first module using a first encryption key and controls activation of the first encrypted module.

公开(公告)号：US11126724B2

公开(公告)日：2021-09-21

申请号：US16073022

申请日：2016-05-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Marvin D Nelson ,  Honee L Mesa ,  Paul Jeran ,  Chris R Gunning ,  Erik D Ness

IPC: G06F21/57 ,  G06F21/60 ,  G06F8/65

Abstract: Examples associated with firmware encryption are described. One example device firmware includes a base module. The base module controls a base function of the device. The device firmware also includes a first encrypted module that modifies a first function of the device. The first encrypted module is inactive until decrypted. A decryption module decrypts the first module using a first encryption key and controls activation of the first encrypted module.

公开(公告)号：US10530966B2

公开(公告)日：2020-01-07

申请号：US16073033

申请日：2016-05-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Honee L Mesa ,  Marvin D Nelson ,  Paul Jeran ,  Chris R Gunning ,  Erik D Ness

IPC: H04N1/44 ,  G06F21/44 ,  G06F21/60 ,  G06F21/76 ,  H04L9/08 ,  H04N1/00

Abstract: Examples associated with printer firmware encryption are described. One example printer includes a base firmware module. The base firmware module controls a base function of the printer. The printer also includes a first encrypted firmware module that modifies a first function of the printer. The first encrypted module is inactive until decrypted. A firmware decryption module decrypts the first encrypted module upon receiving a first encryption key.

公开(公告)号：US20190037106A1

公开(公告)日：2019-01-31

申请号：US16073031

申请日：2015-05-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Paul Jeran ,  Marvin D Nelson ,  Honee L Mesa ,  Chris R Gunning ,  Erik D Ness

IPC: H04N1/44 ,  G06F21/44 ,  G06F21/60 ,  H04L9/08 ,  G06F21/72 ,  H04N1/00

CPC classification number: H04N1/4426 ,  G06F21/44 ,  G06F21/57 ,  G06F21/608 ,  G06F21/72 ,  H04L9/0819 ,  H04N1/0097 ,  H04N1/4433

Abstract: Examples associated with printer authentication are described. One example print container includes a space for a supply of print material and an interface for delivering the print material to a printer to which the print container is connected. An authentication module provides an authentication signal to a decrypted module embedded in firmware of the printer. The decrypted firmware module is kept in an encrypted state until decrypted by a decryption module embedded in the firmware of the printer. The decrypted module is decrypted after the decryption module receives a decryption key after release of the printer.

公开(公告)号：US10536611B2

公开(公告)日：2020-01-14

申请号：US16073031

申请日：2016-05-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Paul Jeran ,  Marvin D Nelson ,  Honee L Mesa ,  Chris R Gunning ,  Erik D Ness

IPC: H04N1/44 ,  G06F21/44 ,  G06F21/60 ,  G06F21/72 ,  H04L9/08 ,  H04N1/00

Abstract: Examples associated with printer authentication are described. One example print container includes a space for a supply of print material and an interface for delivering the print material to a printer to which the print container is connected. An authentication module provides an authentication signal to a decrypted module embedded in firmware of the printer. The decrypted firmware module is kept in an encrypted state until decrypted by a decryption module embedded in the firmware of the printer. The decrypted module is decrypted after the decryption module receives a decryption key after release of the printer.

公开(公告)号：US10375272B2

公开(公告)日：2019-08-06

申请号：US15778411

申请日：2016-03-22

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Marvin D Nelson ,  Kurt Robert Bengtson

IPC: H04N1/413 ,  B41J2/195 ,  H04N1/032 ,  H04N1/407 ,  H04N1/50

Abstract: In one example, image forming quality is stabilized by monitoring aging characteristics of an image forming system including its set of supplies. When an age-related triggering event occurs, a set of modified parameters are substituted for a set of standardized parameters. This substitution increases the image forming quality while sacrificing some visual acuity based on user preferences from psychometric testing.

公开(公告)号：US20180352112A1

公开(公告)日：2018-12-06

申请号：US15778411

申请日：2016-03-22

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Marvin D Nelson ,  Kurt Robert Bengtson

IPC: H04N1/413 ,  B41J2/195 ,  H04N1/407 ,  H04N1/50 ,  H04N1/032

CPC classification number: H04N1/413 ,  B41J2/195 ,  H04N1/032 ,  H04N1/40006 ,  H04N1/407 ,  H04N1/504

Abstract: In one example, image forming quality is stabilized by monitoring aging characteristics of an image forming system including its set of supplies. When an age-related triggering event occurs, a set of modified parameters are substituted for a set of standardized parameters. This substitution increases the image forming quality while sacrificing some visual acuity based on user preferences from psychometric testing.