@NCSC- Secure communication principles

We're pleased to announce the alpha release of our secure communication principles... https://t.co/BiMlqHa6a1 pic.twitter.com/V7FqHjAXy5
— NCSC UK (@NCSC) January 25, 2020

NCSC link here;

Secure communications principles: alpha release

Guidance to help you assess the security of voice, video and messaging communication services