Work on End-to-End Encryption

[aprilthepink]

The Lysand protocol needs E2EE support.

Below are a list of things that need to be written, documented and then audited:

• E2EE Extension
  • Devices list
  • More

E2EE should not be added as an official extension before it has been fully tested and audited by professionals.

[CPlusPatch]

E2EE will be tested in Lysand Server as an undocumented extension before it is documented and released