公开(公告)号：US20230327860A1

公开(公告)日：2023-10-12

申请号：US18042445

申请日：2020-08-28

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

Inventor： Yong Qi Wang ,  Thalia May Laing ,  Joshua Serratelli Schiffman

IPC: H04L9/08 ,  H04L9/30

CPC classification number: H04L9/085 ,  H04L9/3093

Abstract: Example implementations provide machine readable storage storing machine executable instructions, arranged, when processed by a processor, for a succeeding generation player device accessing an unassigned share in a secret the instructions comprising C instructions to: (a.) receive an intermediate generation share of a set of intermediate shares, the intermediate generation share being arranged to facilitate access to the unassigned share and the intermediate generation share having been derived by an intermediate generation player device from shares of further shares provided by a set of preceding generation player devices; (b.) receive, from a set of other intermediate generation player devices, a set of other intermediate generation shares of the set of intermediate shares, to facilitate access by the succeeding generation player device to the unassigned share in conjunction with the intermediate generation share; and (c.) access the unassigned share using the intermediate generation share and the set of other intermediate generation shares.

公开(公告)号：US20230179432A1

公开(公告)日：2023-06-08

申请号：US17937796

申请日：2022-10-04

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

Inventor： Thalia May Laing ,  Adrian John Baldwin ,  Boris Balacheff ,  Joshua Serratelli Schiffman ,  Richard Alden Bramley, JR. ,  Jeffrey Kevin Jeansonne

IPC: H04L9/32 ,  H04L9/08 ,  G06F21/44 ,  G06F21/86

CPC classification number: H04L9/3271 ,  H04L9/0825 ,  G06F21/44 ,  G06F21/86

Abstract: Instructions may be provided to cause a computing device to receive authorisation data, the authorisation data indicating a policy; output a cryptographic challenge, the cryptographic challenge associated with the computing device and the policy; receive a response to the cryptographic challenge; receive an indication that a hardware change has occurred or a cover of the computing device has been opened; and in response to a determination, based on the received response, that the cryptographic challenge is passed, react to the indication according to the policy.

公开(公告)号：US20230061057A1

公开(公告)日：2023-03-02

申请号：US17663051

申请日：2022-05-12

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

Inventor： Thalia May Laing ,  Joshua Serratelli Schiffman ,  Adrian John Baldwin ,  Boris Balacheff ,  Christopher Ian Dalton ,  Jeffrey Kevin Jeansonne

IPC: H04L9/32 ,  H04L9/14 ,  H04L9/30 ,  H04L9/08

Abstract: In an example, a method is described. The method comprises receiving a log comprising information about a computing system. The log is sent by a computing device associated with the computing system. The computing device comprises a first identity bound to a third identity of a certificate authority (CA) and a second identity bound to the first identity. The method further comprises receiving a signature for the log. The method further comprises verifying a certificate indicative of the second identity having been certified. The method further comprises verifying the received signature.

公开(公告)号：US20220342992A1

公开(公告)日：2022-10-27

申请号：US17761691

申请日：2019-10-28

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

Inventor： Joshua Serratelli Schiffman ,  Carey Huscroft ,  Pierre Belgarric

IPC: G06F21/57 ,  G06F21/53 ,  G06F21/30

Abstract: The present disclosure relates to methods, devices, and computer-readable media. In an example there is disclosed a method comprising detecting a state of a computing device, the computing device comprising at least one component. The method may further comprise comparing the detected state with a certified state of the device, the certified state indicating an expected state of the device as certified by a trusted authority. The method may further comprise, in response to the detected state and the certified state being different, identifying a component as a source of the difference and checking, by the trusted authority, whether the component is legitimate or not. The method may further still comprise, in response to the component being legitimate, certifying the difference and updating the certified state.

公开(公告)号：US11356249B2

公开(公告)日：2022-06-07

申请号：US16760532

申请日：2018-01-02

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

Inventor： Helen Balinsky ,  Chris Dalton ,  Joshua Serratelli Schiffman

IPC: H04L9/08 ,  H04L9/32

Abstract: A method for regulating modification of a distributed digital ledger at a node comprises controlling access to a cryptographic key used to enable modification of the distributed digital ledger according to a policy maintained by at least one owner of the distributed digital ledger.

公开(公告)号：US20220138304A1

公开(公告)日：2022-05-05

申请号：US17415231

申请日：2020-06-23

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

Inventor： Gaetan Wattiau ,  Joshua Serratelli Schiffman ,  Thalia Laing ,  Boris Balacheff

IPC: G06F21/34

Abstract: In an example there is provided a method of authenticating a user. An authentication challenge is received in response to a request to authenticate a user. The challenge is distributed to each device from a subset of a set of registered devices. At each device a share of an authentication token is accessed and a partial response to the challenge is generated based on an authentication token and challenge. A response to the challenge is generated by combining the partial responses from the subset of devices, and is communicated to an authenticator. The user is authenticated when the subset of devices is an authorised subset. Every authorised subset of the set of registered devices comprises at least one device from the first group of devices.

公开(公告)号：US20220108014A1

公开(公告)日：2022-04-07

申请号：US17414488

申请日：2019-06-26

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

Inventor： Joshua Serratelli Schiffman ,  Thalia Laing ,  Gaetan Wattiau

IPC: G06F21/57

Abstract: In an example, a method includes requesting, from a node associated with a group comprising a plurality of computing devices associated with an access structure defining a set within the group of computing devices, an attestation of a capability of the set; receiving the attestation; and implementing, based on the received attestation, a procedure according to a device capability policy.

公开(公告)号：US20210176037A1

公开(公告)日：2021-06-10

申请号：US17047291

申请日：2018-08-28

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

Inventor： Joshua Serratelli Schiffman ,  Thalia May Laing ,  Gaëtan Wattiau

IPC: H04L9/06 ,  H04L9/32 ,  G09C1/06 ,  G06F3/12

Abstract: There is disclosed a method for encrypting data representing a rendering task, the method comprising segmenting the data to form multiple variably sized segments, wherein each segment comprises a payload, and a footer portion comprising at least a footer size section indicating the size of a footer encoding the size of a subsequent segment, and encrypting each segment using data associated with that segment and the rendering task.

公开(公告)号：US20200167490A1

公开(公告)日：2020-05-28

申请号：US16612978

申请日：2018-07-13

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

Inventor： Joshua Serratelli Schiffman ,  Luke T. Mather ,  Boris Balacheff

IPC: G06F21/60 ,  H04L29/06 ,  H04L9/08 ,  G06F9/48

Abstract: A method is described for enforcing a secure print policy, the method comprising providing a security policy, cryptographically binding the security policy to a print job to generate a secure print job, verify security properties of at least one of: a printer and an intermediary device using the security policy and a remote attestation protocol, and provided the security properties are verified, releasing the print job to the printer.

公开(公告)号：US20200153807A1

公开(公告)日：2020-05-14

申请号：US16629981

申请日：2017-07-18

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

Inventor： Joshua Serratelli Schiffman ,  Luke T. Mather

IPC: H04L29/06 ,  G06F21/60 ,  H04L9/08

Abstract: A method for registering the identity of a rendering apparatus, the method comprising generating a passphrase using a processor of the rendering apparatus, attesting to the validity of the passphrase at user equipment or submitting the passphrase to the user equipment, encrypting a rendering apparatus identity using a cryptographic session key agreed on the basis of the passphrase, and transferring the rendering apparatus identity from the user equipment to a user apparatus