公开(公告)号：US20180288072A1

公开(公告)日：2018-10-04

申请号：US15471306

申请日：2017-03-28

Applicant: Cisco Technology, Inc.

Inventor： Foster Glenn Lipkey ,  John Joseph Groetzinger ,  Aaron Frederick Louks

IPC: H04L29/06 ,  H04L9/06

CPC classification number: H04L63/1416 ,  H04L9/0643 ,  H04L9/0894 ,  H04L63/145 ,  H04L2209/38

Abstract: A server communicates over a network with a data inspection device (DID) having access to at least portions of a data file, and assists the DID with matching the data file to known data files represented on the server. A hash tree is constructed for each known data file. To construct each hash tree: the known data file is fragmented into contiguous fragments; spaced fragments separated based on an offset schema are selected from the contiguous fragments; and nodes of the hash tree are generated based on hashes of the spaced fragments, but not the skipped fragments. A hash of a fragment of the data file is received from the DID, and it is compared to the hash trees constructed using the offset schema. Compare results are sent to the data inspection device indicating a match or a mismatch between the received hash and the hash trees.

公开(公告)号：US20240073036A1

公开(公告)日：2024-02-29

申请号：US17898042

申请日：2022-08-29

Applicant: Cisco Technology, Inc.

Inventor： John Herman Hess III ,  Nikhil Sainath Kale ,  Foster Glenn Lipkey ,  John Joseph Groetzinger

IPC: H04L9/32

CPC classification number: H04L9/3268 ,  H04L9/3247

Abstract: Techniques are described for embedded device based fingerprint signing and public ledger registering management. A digital fingerprint associated with media content can be identified. An embedded integrated circuit (IC) of the computing device can be utilized to store security data associated with the media content. The security data can include at least one digital certificate. The at least one digital certificate can include a device certificate utilized to generate a cryptographic signature associated with the metadata and the digital fingerprint. A file can be generated and registered with a public ledger. The file can include the digital fingerprint, the metadata, the at least one certificate, and the cryptographic signature.

公开(公告)号：US10567399B2

公开(公告)日：2020-02-18

申请号：US15471306

申请日：2017-03-28

Applicant: Cisco Technology, Inc.

Inventor： Foster Glenn Lipkey ,  John Joseph Groetzinger ,  Aaron Frederick Louks

IPC: H04L29/06 ,  H04L9/06

Abstract: A server communicates over a network with a data inspection device (DID) having access to at least portions of a data file, and assists the DID with matching the data file to known data files represented on the server. A hash tree is constructed for each known data file. To construct each hash tree: the known data file is fragmented into contiguous fragments; spaced fragments separated based on an offset schema are selected from the contiguous fragments; and nodes of the hash tree are generated based on hashes of the spaced fragments, but not the skipped fragments. A hash of a fragment of the data file is received from the DID, and it is compared to the hash trees constructed using the offset schema. Compare results are sent to the data inspection device indicating a match or a mismatch between the received hash and the hash trees.