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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.