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Highly Sensitive Encrypted Email at Risk of Exposure

A newfound flaw in email clients that use PGP and S/MIME to encrypt messages can be exploited to expose the plain text of the missives, according to a new paper. By injecting malicious snippets of text into encrypted messages, attackers can use the flaw to make the email client exfiltrate decrypted copies of the emails, explained the authors, a team of researchers from three European universities. Malicious action is triggered as soon as a recipient opens a single crafted email from an attacker, they wrote.

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