Forcing the terrorists&#x2F;criminals to roll their own encryption would be a huge win for both law enforcement&#x2F;foreign intelligence agencies and the general public.  When non-cryptographers write their encryption software the likelihood that it&#x27;s insecure goes up, and if they&#x27;re off using Mujahideen Secrets v5.0 instead of WhatsApp their communications would stick out like a sore thumb instead of blending in with regular users.  When the terrorists&#x2F;etc. don&#x27;t blend in, the FBI&#x2F;NSA&#x2F;etc. don&#x27;t have to sift through mainstream communications channels to figure out which people are bad guys and which are just regular people.