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Cryptography Experts Recommend Apple Replace its iMessage Encryption
Apple has implemented a series of short- and long-term defenses to its iMessage protocol after several issues were discovered by a team of researchers at John Hopkins University, according to a report published today (via PatentlyApple).This attack is different to the one John Hopkins researchers discovered in March, which allowed an attacker to decrypt photos and videos sent over iMessage.The technical paper details how another method known as a "ciphertext attack" allowed them to retrospectively decrypt certain types of payloads and attachments when either the sender or receiver is still online.The scenario requires that the attacker intercepts messages using stolen TLS certificates or by gaining access to Apple's servers, by legal or illegal means. While the attack takes a high level of technical expertise to be successful, the researchers note that it would be well within the means of state-sponsored actors.
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