http://satoshi.nakamotoinstitute.org/emails/cryptography/1/ http://satoshi.nakamotoinstitute.org/emails/cryptography/1/ He used the cryptography mailing list.

http://satoshi.nakamotoinstitute.org/emails/cryptography/1/ http://satoshi.nakamotoinstitute.org/emails/cryptography/1/ He used the cryptography mailing list. Then the P2P forums. I highly recommend reading through the archives. There are several good observations to make there, like how scaling was basically the first issue he addressed (or failed to address, depending on your view). Another interesting thread: https://bitcointalk.org/index.php?topic=1347.msg15121#msg15121 https://bitcointalk.org/index.php?topic=1347.msg15121#msg151...