Quote from: josvazg on April 10, 2013, 10:08:39 AM

Again,

what's wrong with upgrading bitcoin support instantly confirmed decentralized payment in addition to the ones it already supports?

Can anybody explain what problems do they see in that?

The problem is, that Bitcoin is build about that confirmations in Blocks. It's necessary to ensure that Bitcoin is resilient to attacks.

Therefore the Mining ensures that an attacker would nee more than 50% of all Processing Power mining on the "good" site to have a long term success.

If you want faster confirmations, the Bandwidth requirements for the network increase to not find a lot of orphan blocks.

If you want instant confirmations and still no central authority you would basically need unlimited bandwidth.

I don't understand what the problem with 0 confirmations is. Do you have any Idea how hard it is to double spend a transaction.

The only really Dangerous attack requires the participation of a miner with a reasonable % of the networks hashing power and even than success is improbable.

So the costs of a successful double spend would require Mining Equipment worth Millions of $ by now.

Is this dangerous for day to day transactions?