Streaming system and method

• US 9,088,548 B2
• Filed: 10/09/2013
• Issued: 07/21/2015
• Est. Priority Date: 11/01/2002
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Futagami, Motomasa, Sakaguchi, Tatsumi, Horiguchi, Masato
• Primary Examiner(s): Armouche, Hadi
• Assistant Examiner(s): Zarrineh, Shahriar
• Application Number:
  US14/049,788
• Publication Number:
  US 20140040613A1
• Time in Patent Office: 650 Days
• Field of Search: 726/160
• US Class Current: 1/1
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/0457 wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption cryptographic mechanisms or cryptographic arrangements for stream encryption H04L9/065
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04L 63/164 at the network layer
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 9/00 Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 21/6437 Real-time Transport Protocol [RTP]
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

A streaming system includes an authoring unit (2), a stream server (3) and a client terminal (5). The authoring unit generates a file composed of encrypted contents data and the ancillary information at least containing the packetizing control information for generating an RTP packet, a non-encrypted codec dependent header made up of the information pertinent to encoded contents data, and the encryption information for decrypting the encrypted contents data form packet to packet. The streaming server packetizes the encrypted contents data along with at least the codec dependent header and distributes the resulting data as a stream. The client terminal refers to the codec dependent header of the received packet, re-assembles the packet, and decrypts the encrypted contents data of the re-assembled packet to generate contents data.

Claims

1. A receiving apparatus comprising:

circuitry configured to

send a request for a contents data,

receive, in response to the request, one or more Real-time Transfer Protocol (RTP) packets formatted according to a data transfer protocol, from a streaming server,

decrypt an encrypted contents data included in each received RTP packet by decrypting each RTP packet individually using packet specific encryption information, the decryption being performed based on an independently assigned non-encrypted cryptoheader for each RTP packet, and

re-assemble the one or more received RTP packets by using non-encrypted encoding related information included in the one or more RTP packets.

2. The receiving apparatus of claim 1, wherein the encrypted contents data included in one or more received RTP packets are first re-assembled and then decrypted.

3. The receiving apparatus of claim 1, wherein the receiving apparatus receives a license managed by a license management entity in order to access the encrypted contents data.

4. The receiving apparatus of claim 3, wherein said license includes at least one of a cipher key to decrypt the encrypted contents data and user rights of the contents data.

5. The receiving apparatus of claim 1, wherein the non-encrypted encoding related information is a packet payload header.

6. The receiving apparatus of claim 1, wherein the encrypted contents data is encrypted in accordance with a counter-mode encryption system.

7. The receiving apparatus of claim 1, where the circuitry is further configured to receive a license from a license management entity, the license comprising at least one of a content encryption key to decrypt the encrypted contents data and user rights of the contents data.

8. A streaming method comprising:

sending a request for a contents data;

receiving, in response to the request, one or more Real-time Transport Protocol (RTP) packets formatted according to a data transfer protocol, from a streaming server;

decrypting, using processing circuitry, an encrypted contents data included in each received RTP packet by decrypting each RTP packet individually using packet specific encryption information, the decryption being performed based on an independently assigned non-encrypted cryptoheader for each RTP packet; and

re-assembling the one or more received RTP packets by using non-encrypted encoding related information included in the one or more RTP packets.

9. The method of claim 8, wherein the encrypted contents data included in the one or more received RTP packets are first re-assembled and then decrypted.

10. The method of claim 8, further comprising:

receiving a license managed by a license management entity in order to access the encrypted contents data.

11. The method of claim 10, wherein said license includes at least one of a cipher key to decrypt the encrypted contents data and user rights of the contents data.

12. The method of claim 8, wherein the non encrypted encoding related information is a packet payload header.

13. The method of claim 8, wherein the encrypted contents data is encrypted in accordance with a counter-mode encryption system.

14. The method of claim 8, further comprising:

receiving a license from a license management entity, the license comprising at least one of a content encryption key to decrypt the encrypted contents data and user rights of the contents data.

15. A streaming server sending apparatus comprising:

circuitry configured to

receive a request for a contents data, and

send, in response to the request, one or more Real-time Transfer Protocol (RTP) packets formatted according to a data transfer protocol, to a reception apparatus,

wherein the one or more RTP packets are encrypted to generate encrypted contents data, each RTP packet including an independently assigned non-encrypted cryptoheader identifying packet specific encryption information, and

wherein the one or more RTP packets include non-encrypted encoding related information enabling re-assembly of the one or more received RTP packets.

16. The server of claim 15, wherein the non-encrypted encoding related information is a packet payload header.