U.S. ambassador to Ukraine overheard a phone call between President Donald Trump and a key ambassador in Ukraine. Security experts say the call could have been intercepted by Russian spies. It’s not yet clear what type of phones Sondland and Trump may have been using, or if they used an encrypted calling or messaging app such as WhatsApp or Signal. The use of private cell phones to discuss official diplomatic issues is a monumental security lapse, says Jake Williams, founder of Rendition Infosec and former operator with the National Security Agency.”]
Source: https://www.govinfosecurity.com/risky-dialing-trump-call-raises-security-worries-a-13406