Bitcoin Forum

Bitcoin Is Broken - And not just superficially so, but fundamentally, at the core protocol level. We're not talking about a simple buffer overflow here, or even a badly designed API that can be easily patched; instead, the problem is intrinsic to the entire way Bitcoin works.....

http://hackingdistributed.com/2013/11/04/bitcoin-is-broken/

Published right when Bitcoin goes up.  Coincidence?  If I were you I would check the math before stating Bitcoin is broken.  Anyone can publish a "whitepaper" with sophisticated calculations signed by a fake person.

Earlier post with same/similar topic here:

https://bitcointalk.org/index.php?topic=325225.0

I've got $250 that says it isn't.

FUD

is it already going back up?

The 51% attack has been known about from the start. It's not a "flaw," it's a compromise made in order to get the specific features that make bitcoin what it is. It's constantly addressed and factored into the actions of the community.

This is why many of us are happy with ASICs coming about; the higher the hashrate, the harder it is for any group to execute the attack. Although even if they did, there are limits to what a successful attacker could do, and how long they could sustain the attack. And regardless of all that, they still couldn't steal your coins.

/sigh


well if it's broken then these ___ BTC are worthless.   

*boots computer to the sidewalk*

Well, if "selfish" mining strategy is more profitable then the "honest", everybody will (in theory) switch to it so they can compete with each other. However, this technique hugely depends on luck while trying to propagate competing block through the network which will not always be successful.

So this is just plain, old >50% attack? Is that it?

People love creating panic, indeed :-)

Bitcoin is not broken, but here are serious road-blocks ahead:
https://bitcointalk.org/index.php?topic=325642.0

No. If Bitcoin were broken the price would be exactly zero.

No. We've got $272 that say it isn't! I'm so happy BTC broke its last high price record of $266.  ;D
Woot! woot!

Yey record high! :D

Yep useless fud

yep, i have to agree with the OP.

Bitcoin is broken to the upside!

Furthermore, Bitcoin is broken to a new high!

Yay!

It is not a 51% attack. This is an attack that anyone can do, but the higher your hash rate, the more profitable it is.

Basically, the idea is to manipulate reporting of new blocks in a way that sometimes cheats other miners out of their block rewards. There are two natural resistances to this attack. 1. It works best if only one pool does it. If everyone does it, then everyone is equal and it fails. 2. The paper claims that the problem is that if a pool does it, then more people will join the pool putting it over 51%. However, the more people that join the pool, the less profit there will be from the attack, so there is an incentive to keep the pool small.

In short, there may not even be a problem, or there is a problem, it could be small.

Gez!! It's not my article! I just added it to get feedback! Man!! the value of BTC will continue to rise to unimaginable high's I believe!! Don't take the post as an attack, it was just a heads up!!