lucre double-blinding? (Re: Crypto-making vs Crypto-breaking)

[Ben Laurie]

Adam Back wrote:

> It's been a while since I looked at the Lucre white paper but
> extrapolating from the Chaum context doesn't double blinding mean the
> payer and payee have to be simultaneously online with the bank?

Lucre coins can _only_ be verified by the bank. However, only the payee
needs to be talking to the bank (the payer gives the payee an unblinded
coin), and can, at their own risk, defer that conversation (the risk
being a double-spend, of course). Double-blinding refers to a method
using two blinding factors, not any other weird combination you might
have thought of :-)

Cheers,

Ben.

-- 
http://www.apache-ssl.org/ben.html       http://www.thebunker.net/

"There is no limit to what a man can do or how far he can go if he
doesn't mind who gets the credit." - Robert Woodruff