Contact Tracing
Singapore to give all residents wearables for contact tracing
Coronavirus Tracking Project
Apple and Google join forces on coronavirus tracking project
Contact-Tracing Apps
Contact-tracing apps could help end coronavirus lockdown
track the coronavirus
New app uses location data to track the coronavirus
audio jammer
Hey Alexa, quit eavesdropping 
anti-facial recognition
The anti-facial recognition fashion statement
gait recognition
New tech can see through walls and ID people by the way they walk
Send messages and use apps without the internet1:27
How an exiled cryptographer is protecting journalists in his native Ethiopia3:57
Using fashion to fool facial recognition1:01