Quote from: etotheipi on May 10, 2013, 12:15:36 AM

Quote from: Maged on May 10, 2013, 12:10:00 AM

Of course not. Until bitcoins become commonplace, the most common user of zero-confirmation transactions - brick and mortar businesses - won't really exist. If this change is inevitable like you guys claim, why not wait for it to happen naturally?

False sense of security.

The point of all this is that zero-conf tx should not be used for zero-trust situations.

Why are you on the internet right now? After all, it is impossible* to get a virus if you don't have an internet connection.

*Yeah, there are other ways, but ignore that for now.

What about your money? I suspect that you have it all in gold (because USD can't be trusted) stored in a vault that you personally designed (because someone else may have put a backdoor in their design) stored under your personal supervision. After all, every action you ever take must require zero-trust, right?

Please tell me that you get where I'm going with this. This is a problem that should be solved through general education, not reducing effective security. Also, stores don't even need to ask for ID - they just need to have a camera, which is something that they should have to prevent general shoplifting anyway.

Quote from: edmundedgar on May 10, 2013, 02:47:59 AM

Quote from: etotheipi on May 10, 2013, 02:21:26 AM

Zero-conf replacement requires only a few miners to participate for it to make zero-conf transactions pretty much useless in zero-trust transactions.

I don't think that's right - people accepting zero-confirmation transactions are already playing the odds. 1% of mining power taking the later arrival with the higher transaction fee still leaves you getting the payment 99% of the time, so in a lot of cases it would still be worth it for the extra sales.

Double-spend attackers welcome, buy 99 pizzas and get one free...

And that's worst case, when every order is made by an attacker.