Snowden helped design an app that turns your old phone into a surveillance device to help solve the "evil maid" problem

[Enkita]

@Horselover_Fat

Regardless of whatever good intentions he may have had in his whistleblowing activities, Snowden currently owes his freedom to the same Russian government that was (and still is) heavily involved in hacking and disinformation campaigns. I would not want him within ten feet of any of my digital appliances.

One assumes that this is an app that could easily be reverse engineered and wiresharked, so this isn’t really relevant. Also, when it comes to security, history shows that ad hominem is not terribly effective as a security test.
Perhaps BlackBerry could develop a version for all the old BB10 phones lying around. they would have pretty good security. I’d suggest WinPho but Microsoft seem uninterested in it.