Urgent: US citizens: FTC to require platforms to be end-to-end encrypted.

Urgent: US citizens: call on the FTC to require platforms to make their direct messages end-to-end encrypted.

This is a half-measure. Truly secure encrytion has to be done by a free client program that the user installs independently of the platform. Therefore it can't be implemented by a communication platform.

If the encryption is done by the platform -- either in its server, or in its nonfree client program, or in code sent to the user's browser (for instance, in Javascript) -- then the platform has control over the encryption, and can backdoor it at will.