# Gavin Andresen
# 2012-07-25 19:20:58
# https://bitcointalk.org/index.php?topic=94999.msg1053771#msg1053771

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"We" thought of that (where "we" was actually Khalahan and Pieter and Gregory, if I recall correctly). @p{par}

The string "Bitcoin Signed Message:\n" is prepended to the message as salt, then that's SHA256-hashed twice, and the hash is what is signed/verified. Sign anything you like, it won't reveal information about your keys (unless your OpenSLL implementation has a broken random number generator and doesn't @p{(link}generate unique signing nonces@p{link)}).