It is http://www.mail-archive.com/cryptography@metzdowd.com/msg10013.html

, And, he wanted an open PoS system at base, not PoW

It is http://www.mail-archive.com/cryptography@metzdowd.com/msg10013.html

And, he wanted an open PoS system at base, not PoW

To maintain a consensus on who owns what coins, who owns
what coins has to be public.