WhatsApp has a huge security hole. Here's how to fix it
WhatsApp has a gaping secuirty hole in the middle of its app. But it can be easily fixed. An issue with the way that the app deals with the security keys central to its encryption mean that people can actually spy on messages, one security researcher has found. End-to-end encryption is intended as a way of ensuring that messages can only be read by the sender and their intended recipient, but the encryption keys that power that technology can be a weak link if tehy are wrongly used.
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