What is End-to-End Encryption Video Call?

End-to-end encrypted video calls protect audio, video, and screen-sharing media by encrypting encoded frames on participants’ devices, allowing VideoSDK’s infrastructure and SFUs to route ciphertext without access to room decryption keys. VideoSDK uses a client-side, room-level shared key model, with applications responsible for generating, securely distributing, storing, revoking, and replacing keys after verifying participant identity and membership. This protection extends beyond standard WebRTC transport encryption, which secures network connections but may permit an SFU to decrypt media unless an additional application-layer E2EE mechanism is used. E2EE does not encrypt chat, metadata, signalling, or API traffic, though those remain TLS-protected, and it cannot protect against compromised devices, malicious participants, or screen capture. Recording and transcription are unavailable in VideoSDK E2EE rooms because server-side processing requires media access, making E2EE most appropriate when provider-blind media confidentiality outweighs such features. The guide emphasizes threat modeling, short-lived scoped tokens, separate handling of tokens and keys, fail-closed encryption behavior, endpoint security, safe audit logging, cross-platform testing, and clear user communication, while noting that E2EE alone does not establish regulatory compliance or eliminate broader security and privacy responsibilities.

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