Telegram user HackrHamza, whose profile image includes the flag of the Islamic State, recently shared the homepage of Wickr, an encrypted messaging service for businesses, as well as a blog post by cryptographer and Johns Hopkins University professor Matthew Green. The blog post was titled "Attack Of The Week: Group Messaging In WhatsApp And Signal." The post discusses a recent research paper that examines the theoretical weaknesses in using group chats, rather than one-on-one chats, on encrypted messaging services.
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