home.md

@@ -107,6 +107,15 @@ Yes! fairmeeting is very GDPR sensitive and does not store anything from a confe
 
 Yes. fairmeeting uses the WebRTC standard, which has [encryption built in](https://jitsi.org/security).  Choose a room name, nobody else can guess, unless you want visitors by chance :wink:. You can also lock a room by setting a password (and pressing return) after all participants joined. For advanced security, [E2EE can be activated](https://jitsi.org/e2ee-in-jitsi/) by sharing a common secret with the shield icon. Only supported for participants with Chrome/Chromium, MS Edge, Opera, Brave browser or the [Jitsi Desktop App](https://github.com/jitsi/jitsi-meet-electron). 
 
+In detail: Jitsi uses 2 layers of encryption ([source](https://community.jitsi.org/t/why-do-we-need-to-use-srtp-when-e2ee-is-enabled/127532)).
+
+- Encrypting the audio/video media at the source with AES-GCM​           
+- Then add metadata and encrypt again with DTLS-SRTP​
+
+This way, when the JVB decrypts the DTLS-SRTP payload. It still has access to the required metadata to properly route the packet, while not having access to the actual media content.
+
+So each participant would have a key pair to encrypt and decrypt SRTP​ packets sending to and receiving from JVB.
+
 ### Can I record or stream a session?
 
 Built-in recording or streaming is available for selected fairmeeting domains only. For example at `pro.fairmeeting.net` you may send a stream to YouTube or fairtube. 
@@ -123,6 +132,8 @@ If you append `#config.iAmRecorder=true` to the URL, the own video window will b
 
 You can stream your session perfectly with the great [Open Broadcaster Software](https://obsproject.com/). Here is a tutorial https://git.fairkom.net/hosting/fairmeeting/issues/20#note_21771 OBS even allows you also to insert scenes before or after your video conferencing sessions. Always ask all participants first!
 
+Since 2023, it is also possible to start a local recording within a Chromium based browser. 
+
 ### Can I play stereo?
 
 Yes, however echo cancelling will be switched off then.