[Cryptography] Apple Group FaceTime and end-to-end and encryption

Stefano Quintarelli stefano at quintarelli.it
Thu Jun 7 08:22:00 EDT 2018

On 06/06/2018 12:51, Jerry Leichter wrote:
> Anyone know anything yet about how Apple is doing this?  (One would think they would have patented the techniques needed....)

I guess they do what players like vidyo and zoom have been doing.
they use SVC https://en.wikipedia.org/wiki/Scalable_Video_Coding ;
clients communicate to the MCU which stream they want to receive.
the low quality stream is ok for thumbnalis, once the user wants to 
enlarge a specific video stream, they request the full quality stream.

I would suspect all streams are encrypted with the same key and that key 
is shared wncrypted with each user using their key pairs


ciao, s.

More information about the cryptography mailing list