US 11,714,883 B2
Security of surveillance media
Michel Angel, Cheseaux-sur-Lausanne (CH); Hervé Retaureau, Cheseaux-sur-Lausanne (CH); and Antony Celletti, Cheseaux-sur-Lausanne (CH)
Assigned to Nagravision Sàrl, Cheseaux-sur-Lausanne (CH)
Appl. No. 16/492,625
Filed by NAGRAVISION S.A., Cheseaux-sur-Lausanne (CH)
PCT Filed Apr. 4, 2018, PCT No. PCT/EP2018/058628
§ 371(c)(1), (2) Date Sep. 10, 2019,
PCT Pub. No. WO2018/185174, PCT Pub. Date Oct. 11, 2018.
Claims priority of application No. 17164869 (EP), filed on Apr. 4, 2017.
Prior Publication US 2020/0050738 A1, Feb. 13, 2020
Int. Cl. G06F 21/10 (2013.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01); H04N 7/18 (2006.01); H04N 21/2347 (2011.01); H04N 21/266 (2011.01)
CPC G06F 21/10 (2013.01) [H04L 9/0822 (2013.01); H04L 63/0428 (2013.01); H04L 63/068 (2013.01); H04L 63/08 (2013.01); H04L 63/10 (2013.01); H04N 7/183 (2013.01); H04N 21/2347 (2013.01); H04N 21/26613 (2013.01); G06F 2221/0753 (2013.01); H04L 2209/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for securing media content in a network comprising:
at a media device configured to generate audio and/or visual media:
generating audio and/or visual media;
receiving a domain key from a service provider; and
encrypting the media generated by the media device with a media key and encrypting the media key with the domain key to form an encrypted media token;
the method further comprising, at the service provider:
receiving the encrypted media token and one or more receiving entity identifiers relating to a receiving entity;
ascertaining whether the receiving entity is entitled to access media from the media device; and
decrypting the encrypted media token using the domain key to obtain the media key and providing the media key to the receiving entity if the ascertaining step determines that the receiving entity is entitled to access media from the media device, and
not decrypting the encrypted media token using the domain key to obtain the media key if the ascertaining step determines that the receiving entity is not entitled to access media from the media device;
wherein the media comprises data packets encrypted using the media key prior to transmission from the media device, and wherein the method further comprises updating the media key after a pre-determined number of the data packets are encrypted, and wherein subsequent data packets of the data packets of the media are encrypted using the updated media key.