How Hangouts encrypts information
When you message or talk with someone on Hangouts, your information will be encrypted so that it’s secure. This includes your Hangouts conversations and video calls on a web browser, on the Hangouts Android and iOS apps, and in meetings through Chromebox for Meetings.
If you’d like to know more details about how your information is kept safe, you can read the specific encryption methods below.Conversations
All signals, like messages, are encrypted over an HTTPS connection with 128-bit encryption, using TLS 1.2. The connection is encrypted and authenticated using AES_128_GCM. The key exchange mechanism is ECDHE_ECDSA.
To improve audio and video quality, Hangouts calls use a direct peer-to-peer connection when possible, instead of routing through a server.
Audio and video in Hangouts are encrypted using SRTP. Video is AES_CM_128_HMAC_SHA1_80, and audio is AES_CM_128_HMAC_SHA1_32 (128-bit AES encryption and SHA-1 HMAC for authentication).
When you dial a phone number from a Hangout, audio is encrypted until it reaches the carrier network. But telephone carriers are responsible for the audio within carrier networks.
If you’re a network administrator, you can also learn more about optimizing your network for Hangouts.
Brenna is a Hangouts expert and the author of this help page. Help her improve this article by leaving feedback below.