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SUMMARY:007: End-to-End Encrypted Audio Calls via Blind Audio Mixing - Ema
 d Heydari Beni and Lode Hoste\, Nokia Bell Labs
DTSTART:20250527T130000Z
DTEND:20250527T140000Z
UID:TALK231706@talks.cam.ac.uk
CONTACT:Anna Talas
DESCRIPTION:End-to-end encryption (E2EE) for messaging has become an indus
 try standard and is widely implemented in many applications. However\, app
 lying E2EE to audio calls\, particularly group calls\, remains a complex c
 hallenge. Unlike text messages\, audio calls involve capturing audio strea
 ms from each participant\, which must be combined into a single\, coherent
  audio stream that all participants can hear. This is known as audio mixin
 g. In a non-E2EE system\, the audio is mixed by a central server\, and the
  result is sent to each participant. In contrast\, in an E2EE system\, eac
 h audio stream must be encrypted locally and sent to every participant in 
 the group call. This method presents major challenges with respect to netw
 ork overhead\, audio synchronization and limitation on applying audio enha
 ncement techniques.\n\nIn this talk\, we present a new approach using Full
 y Homomorphic Encryption (FHE)\, which enables end-to-end encryption for g
 roup voice calls. Concretely\, we introduce blind audio mixing and an FHE-
 compatible compression technique.\n\nZoom link: https://www.google.com/url
 ?q=https://cam-ac-uk.zoom.us/j/83912370794?pwd%3DKOjLaKTwbRWvlsSjiLSgpTqIk
 Es8xI.1
LOCATION:Webinar &amp\; LT2\, Computer Laboratory\, William Gates Building
 .
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