On Sat, 24 Aug 2019 11:16:57 -0500, Mike Schwab wrote: >Well, keys are supposed to be two large prime numbers. Without a >registry of which numbers have been used, it would be possible for two >people to use the same prime number. > Such a registry would defeat the purpose, although a registry of public keys is plausible. Cryptosystems depend on the extreme unlikeliness of a collision.
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