US 11387982

US patent 11387982B2 information is summarized below:

Title: Method for authenticating a hash of a data packet from collected context data based on a hash distance generation step, first authentication device, second authentication device, and authentication system

Assignee: Thales DIS France SAS

Inventors: Fabrice Delhoste, Frédéric PAILLART, Sébastien PETIT

Filing Date: 2018-11-19

Issue Date: 2022-07-12

Abstract: The invention relates to an authentication method. The method comprises: collecting, based on a predetermined authentication policy, at least one context data element; constituting, based on the at least one collected context data element, a data packet; generating, by using a predetermined hash type algorithm and the data packet, as input to the predetermined hash type algorithm, a hash; sending the generated hash; generating, as a hash distance generation step, a hash distance between the generated hash and a predetermined reference hash; and authenticating successfully or not based on the generated hash distance, as an authentication step. The invention also relates to corresponding device and system.

Plain-Language Overview of Independent Claims:

Claim 1 (Authentication Method):
This claim describes a method for authentication involving several steps. First, a system collects one or more pieces of "context data" (information about the environment or user), guided by a predefined "authentication policy." This context data, which is specifically a captured image represented as a fixed-length string of bits, is then used to form a "data packet." Next, a hash (a byte stream) is generated from this data packet using a specific hashing algorithm. This generated hash is then sent to another device. Upon receipt, a "hash distance" is calculated, comparing the newly generated hash to a previously stored "predetermined reference hash." Finally, the authentication is deemed successful or not based on this calculated hash distance.

Claim 8 (First Authentication Device):
This claim describes a "first authentication device" (e.g., a mobile phone or PC) that is configured to perform the initial steps of the authentication method. Specifically, this device collects at least one context data element (a captured image as a fixed-length string of bits) according to an authentication policy. It then forms a data packet from this collected data. The device generates a hash (a byte stream) from this data packet using a predetermined hash algorithm and then sends this generated hash to a "second authentication device."

Claim 10 (Authentication System):
This claim outlines an entire "authentication system" comprising both a "first authentication device" and at least one "second authentication device." The first authentication device is configured to perform the actions described in Claim 8: collect context data (a captured image as a fixed-length string of bits), constitute a data packet, generate a hash (a byte stream) using a predetermined hash algorithm, and send it to the second device. The second authentication device, in turn, is configured to receive this generated hash, calculate a "hash distance" between the received hash and a predetermined reference hash, and then authenticate (or not) based on this hash distance.

CAFC 2026 Dockets:

The Google Patents page for US11387982B2 indicates that a PTAB case IPR2026-00278 was filed and is pending. The PTAB (Patent Trial and Appeal Board) is part of the USPTO, not the U.S. Court of Appeals for the Federal Circuit (CAFC). Therefore, direct CAFC docket information for IPR2026-00278 would not be available, as it is an active PTAB proceeding. To check the status of IPR2026-00278, one would typically search the PTAB's own case tracking system. No CAFC dockets for 2026 related to US11387982 were found in the search results.