Security researchers flag invite bug in WhatsApp group chats

At the Real World Crypto security conference Wednesday in Zurich, Switzerland, a group of researchers from the Ruhr University Bochum in Germany plan to describe a series of flaws in encrypted messaging apps including WhatsApp, Signal, and Threema.

The researchers unearthed far more significant gaps in WhatsApp’s security: They say that anyone who controls WhatsApp’s servers could effortlessly insert new people into an otherwise private group, even without the permission of the administrator who ostensibly controls access to that conversation.

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