公开(公告)号：US20170289561A1

公开(公告)日：2017-10-05

申请号：US15242535

申请日：2016-08-21

Applicant: Cisco Technology, Inc.

Inventor： David WACHTFOGEL ,  Michal DEVIR ,  Harel CAIN

IPC: H04N19/467 ,  H04N21/2365 ,  H04N21/235

CPC classification number: H04N21/2365 ,  H04N21/2347 ,  H04N21/2351 ,  H04N21/23892 ,  H04N21/8358

Abstract: In one embodiment, a system includes a Headend apparatus including a watermark processor to generate secondary video streams from sections of a primary video stream, group the secondary video streams in groups of at least two secondary video streams, the secondary video streams including units of data for use in watermarking across cryptoperiods in an end-user device which selects one secondary video stream in each group for rendering as part of a composited video stream in order to embed units of data of an identification in the composited video stream, wherein in each cryptoperiod, the watermark processor is operative to generate different groups of the secondary video streams from different non-overlapping portions of the primary video stream, and an encryption processor to generate control words, encrypt each secondary video stream with a different control word, and change the control word of each secondary video stream every cryptoperiod.

公开(公告)号：US20180295376A1

公开(公告)日：2018-10-11

申请号：US16004745

申请日：2018-06-11

Applicant: Cisco Technology, Inc.

Inventor： David WACHTFOGEL ,  Michal DEVIR ,  Harel CAIN

IPC: H04N19/467 ,  H04N21/2365 ,  H04N21/235

Abstract: In one embodiment, a system includes a Headend apparatus including a watermark processor to generate secondary video streams from sections of a primary video stream, group the secondary video streams in groups of at least two secondary video streams, the secondary video streams including units of data for use in watermarking across cryptoperiods in an end-user device which selects one secondary video stream in each group for rendering as part of a composited video stream in order to embed units of data of an identification in the composited video stream, wherein in each cryptoperiod, the watermark processor is operative to generate different groups of the secondary video streams from different non-overlapping portions of the primary video stream, and an encryption processor to generate control words, encrypt each secondary video stream with a different control word, and change the control word of each secondary video stream every cryptoperiod.

公开(公告)号：US20180285537A1

公开(公告)日：2018-10-04

申请号：US15473648

申请日：2017-03-30

Applicant: Cisco Technology, Inc.

Inventor： David WACHTFOGEL ,  Michal DEVIR ,  Harel CAIN

IPC: G06F21/16 ,  G06T1/00 ,  H04N19/44 ,  H04N21/8358 ,  H04N21/4405 ,  H04N5/913

Abstract: In one embodiment, a method for preventing a difference attack on watermarked video content is implemented on at least one computing device and includes: manipulating values of a set of pixels to embed a forensic watermark in at least one video frame in a video content item, where the manipulating is in accordance with a given magnitude of change in the values, and introducing random noise to the at least one video frame, where the random noise is random noise of the given magnitude.

公开(公告)号：US20180184160A1

公开(公告)日：2018-06-28

申请号：US15390502

申请日：2016-12-25

Applicant: Cisco Technology, Inc.

Inventor： Harel CAIN ,  Michal DEVIR ,  David WACHTFOGEL ,  Yaron SELLA

IPC: H04N21/44 ,  H04N21/8358 ,  H04N21/8352 ,  H04N21/434 ,  H04N21/435 ,  H04N21/84 ,  H04N21/4385 ,  H04N21/4405

Abstract: In one embodiment, an apparatus includes a processor to receive a primary video, select first sections of the primary video in which to include units of data for use in watermarking, select second sections of the primary video, each second section including a first data item without which at least one video unit of the primary video cannot be rendered or rendered correctly, replace each first section with at least two watermark variants, replace each second section with at least two watermark variant decoys, wherein the apparatus is operative to operate in an environment including an end-user device operative to select one of the watermark variants for each first section and one of the watermark variant decoys for each second section for rendering as part of an interleaved video stream including the primary video in order to embed units of data of an identification in the interleaved video stream.