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How the Signal Knockoff App TeleMessage Got Hacked in 20 Minutes
(www.wired.com)
This is a most excellent place for technology news and articles.
Big 404 fan, but "original" is misleading. "First article on this topic" is more accurate. OPs link is arguably more interesting.
You might enjoy the full blog post from the author:
https://micahflee.com/despite-misleading-marketing-israeli-company-telemessage-used-by-trump-officials-can-access-plaintext-chat-logs/
Mmmm that's the stuff.