Edward Snowden designed an iPhone case to prevent wireless snooping
 

Edward Snowden is still trying to combat smartphone radio surveillance three years after spilling the NSA's secrets. With help from hacker Andrew "Bunnie" Huang, Snowden presented on Thursday designs at the MIT Media Lab for a case-like add-on device...

https://www.engadget.com/2016/07/21/...ireless-snoop/