How to buy iPhone 13 now Emmys 2021: How to watch Grimes reveals what her son calls her FDA panel rejects Pfizer booster plan for general public SpaceX Inspiration4 mission

Signal encryption app sees 400 percent boost after election

The co-founder of Open Whisper Systems says installations of its app have increased four-fold since November 8.

James Martin/CNET

Signal is getting a strong signal of its popularity.

The encrypted messaging app, made by Open Whisper Systems, has seen a 400 percent increase in installations since last week's presidential election, co-founder Moxie Marlinspike told American Public Radio's Marketplace program.

Marlinspike didn't specify how many users the messaging app had, but said "millions of people" used it before the November 8 election of Republican Donald Trump.

"We've never really seen any single event in the past that's resulted in this kind of sustained, day-over-day, interest," Marlinspike said.

Signal uses end-to-end encryption that scrambles a message so that no one other than the sender and recipient can read it.