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Signal didn't back up contacts and settings to their servers until they implemented "Secure Value Recovery", which relies on SGX to rate-limit guesses of a weak
by milkey_mouse 5y ago
Signal didn't back up contacts and settings to their servers until they implemented "Secure Value Recovery", which relies on SGX to rate-limit guesses of a weak PIN. If SGX is broken and Signal's database falls into the wrong hands, encryption keys could be brute-forced pretty quickly (most people have 4-digit PINs).