Segment Authentication for Dynamic Adaptive Streaming

Patent metadata

Field	Value
Publication number	US-2016197939-A1
Application number	US-201615066759-A
Country	US
Kind code	A1
Filing date	Mar 10, 2016
Priority date	Sep 28, 2012
Publication date	Jul 7, 2016
Grant date	—

Abstract

A method including generating a segment signature for a segment of a media content based on the segment, trusted information contained in a media presentation description (MPD), and a signature signing key, wherein the MPD describes the media content, wherein the segment signature is independent of other segment signatures corresponding to other segments of the media content, and wherein a single copy of the segment signature is configured to be transmitted to a client requesting the segment of the media content thereby permitting the client to determine authenticity of the segment without receiving any additional segment signatures.

First claim

What is claimed is:

1 . A method comprising:
generating a segment signature for a segment of a media content based on the segment, trusted information contained in a media presentation description (MPD), and a signature signing key, wherein the MPD describes the media content, wherein the segment signature is independent of other segment signatures corresponding to other segments of the media content, and wherein a single copy of the segment signature is configured to be transmitted to a client requesting the segment of the media content thereby permitting the client to determine authenticity of the segment without receiving any additional seclment signatures.

2 . The method of claim 1 , wherein the segment and the trusted information contained in the MPD are used to compute a hash value, and wherein the hash value and the signature signing key are used to generate the segment signature.

3 . The method of claim 2 , wherein the trusted information contained in the MPD comprises a segment signature uniform resource locator (URL), and wherein a storage location of the segment signature is retrievable using the segment signature URL.

4 . The method of claim 2 , wherein the trusted information contained in the MPD comprises a seclment uniform resource locator (URL), and wherein a storage location of the segment is retrievable using the segment URL.

5 . The method of claim 1 , wherein the trusted information contained in the MPD comprises a segment signature uniform resource locator (URL) template, wherein the segment signature URL template is used to derive a segment signature URL, wherein the segment signature URL and the segment are used to compute a hash value, and wherein the hash value and the signature signing key are used to generate the segment signature.

6 . The method of claim 5 , wherein the URL template comprises a segment signature URL template.

7 . The method of claim 5 , wherein the URL template comprises a segment URL template.

8 . The method of claim 2 , wherein the trusted information contained in the MPD comprises a content identification (CID), and v,herein the CID is a characteristic of the segment.

9 . The method of claim 2 , wherein the trusted information contained in the MPD is authenticated by a MPD signature of the MPD.

10 . An apparatus comprising:
a processor configured to compute a segment signature for a segment of a media content based on the segment, a signature signing key, and trusted information contained in a media presentation description (MPD), wherein the MPD describes the media content; a receiver configured to receive a request for the MPD; and a transmitter configured to transmit the MPD and to transmit a single copy of the segment signature to a client requesting the segment of the media content thereby permitting the client to determine authenticity of the segment without receiving any additional segment signatures.

11 . The apparatus of claim 10 , wherein the segment and the trusted information contained in the MPD are used to compute a hash value, and wherein the hash value and the signature signing key are used to generate the segment signature.

12 . The apparatus of claim 11 , wherein the trusted information contained in the MPD comprises a segment signature uniform resource locator (URL), and wherein a storage location of the segment signature is retrievable using the segment signature URL.

13 . The apparatus of claim 11 , wherein the trusted information contained in the MPD comprises a segment uniform resource locator (URL), and wherein a storage location of the segment is retrievable using the segment URL.

14 . The apparatus of claim 11 , wherein the trusted information contained in the MPD comprises a segment signature uniform resource locator (URL) template, wherein the segment signature URL template is used to derive a segment signature URL.

15 . The apparatus of claim 14 , wherein the processor is further configured to authenticate the trusted information contained in the MPD by computing a MPD signature.

16 . The apparatus claim 10 , wherein the URL template comprises a segment signature URL template.

17 . The apparatus of claim 10 , wherein the URL template comprises a segment URL template.

Assignees

• Futurewei Technologies Inc

Inventors

• Wang Xin
• Liu Yongliang

Classifications

• H04L63/123 Primary

  received data contents, e.g. message integrity · CPC title

• H04L65/602

  Electricity · mapped topic

• H04N21/835

  Generation of protective data, e.g. certificates {(protecting software against unauthorised usage in a vending or licensing environment G06F21/10)} · CPC title

• H04L65/762

  at the source  (reformatting of additional data in video distribution servers H04N21/2355) · CPC title

• H04N21/8352

  involving content or source identification data, e.g. Unique Material Identifier [UMID] · CPC title