[TRC] [DISCLOSURE] Terracoin Difficulty Collapse Exploit - page 2.

Nolo

hero member

Activity: 686

Merit: 500

Whoa, there are a lot of cats in this wall.

Quote from: celkaris on April 11, 2013, 09:07:17 PM

i personally moved my miners away from p2pool for now, it really looks broken, nearly every found block gets orphaned and stale rate is incredible, i gave a try to multipool.

I'd suggest you check your own p2pool stats (& graphs) page and maybe logs, it can still be coming from my setup.

i'll check my stats tomorrow and then decide if i try solomining or not.

I'm having a good bit of success solo mining. Sure I'm getting some orphans, but that's to be expected.

celkaris

full member

Activity: 148

Merit: 100

i personally moved my miners away from p2pool for now, it really looks broken, nearly every found block gets orphaned and stale rate is incredible, i gave a try to multipool.

I'd suggest you check your own p2pool stats (& graphs) page and maybe logs, it can still be coming from my setup.

i'll check my stats tomorrow and then decide if i try solomining or not.

Nolo

hero member

Activity: 686

Merit: 500

Whoa, there are a lot of cats in this wall.

I've moved 6GH/s to TRC. We need an "Altcoin Rapid Response Team" (ARRT) to fight off jackasses like this.

Remember remember the 5th of November

legendary

Activity: 1862

Merit: 1011

Reverse engineer from time to time

I read the description of OP at least 50 times, but I dun' get it.

Quote

The way the attack works is that a miner collusion

I assume you mean that you need more than one node for this?

Quote

attempts to artificially inflates the time span of each retarget section

And this "group" of miners does this how? Inflation means to increase, increase means it will take longer than 2 minutes to create a block. Not sure how you'd do it. It's possible due to less nodes?

Quote

When the collusion gains momentum theoretically for terracoin I think the difficulty will collapse and block spacing drops close to 0

And again, how do you prevent people from finding blocks? Bear with me, I am thinking as I type, so basically miners will increase the difficulty, then stop till the retarget code decides it needs to go down? And when it goes down it gets exploited by the miners with the most hashpower again?

wmikrut

hero member

Activity: 631

Merit: 501

Ok... I redirected my ~7Gh into TRC P2Pool:
http://www.wmikrut.com:9322/static/

That's all I have.

CoinHoarder

legendary

Activity: 1484

Merit: 1026

In Cryptocoins I Trust

Quote from: seleme on April 11, 2013, 07:32:56 PM

Dev said on Github that he won't play cat and mouse game with the guy who's exploiting terracoin and if people don't mine the attacker will win.

That's reassuring...

fcmatt

legendary

Activity: 2072

Merit: 1001

Quote from: seleme on April 11, 2013, 07:32:56 PM

Dev said on Github that he won't play cat and mouse game with the guy who's exploiting terracoin and if people don't mine the attacker will win.

i guess this is how an alt coin dies then.
seems like there is two too many right now anyway.

it takes 30 of me to equal one avalon. if the guy has 3. we are talking 100 of me just to out do him by a tiny bit.
i doubt that is going to happen.

wmikrut

hero member

Activity: 631

Merit: 501

So how much hash power are we talking here?
I will gladly put my 7Gh into solo mining if that will help... but what's the bigger picture needed to stop this guy?

seleme

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Activity: 2772

Merit: 1028

Duelbits.com

Dev said on Github that he won't play cat and mouse game with the guy who's exploiting terracoin and if people don't mine the attacker will win.

fcmatt

legendary

Activity: 2072

Merit: 1001

so at this point in time trc is terribly broken and i would never mine it because someone is ripping me off?
that about sums it up?

wmikrut

hero member

Activity: 631

Merit: 501

I really don't know at this point... I see the guy churning out blocks so fast -- it seems impossible to keep up.
The difficulty drops to 565... then in seconds shoots back up to 32,000+

In the mean time -- he's turning out blocks in the difficulty range of < 35 at the rate of 1 every couple minutes.
TBH... I am surprised the exchanges haven't suspended TRC trading yet.

Milan77

full member

Activity: 202

Merit: 100

I am mining for few hours no blocks found, with 20Ghash t should be.. at least some... dunno if something is wrong or just bad luck.

wmikrut

hero member

Activity: 631

Merit: 501

Quote from: celkaris on April 11, 2013, 02:12:15 PM

Quote from: wmikrut on April 11, 2013, 02:09:27 PM

Looks like (according to P2Pool) -- the blocks seem to all be coming from:
216.69.248.251,9323

if blocks were generated with p2pool we would see two distinct things:

- p2pool author pubkey / transaction in outputs

- multiple outputs, to addresses belonging to share owners

i doubt he uses p2pool (how would he alter remote existing p2pool installations by the way)

Sorry -- I didn't mean to imply they are using P2Pool.
I meant when I use explorer in P2Pool on these blocks -- they all appear to be coming from the same address.

celkaris

full member

Activity: 148

Merit: 100

what's kinda funny, is that those attacks could come from a pool where miners willing to help point theirs rigs

wmikrut

hero member

Activity: 631

Merit: 501

Quote from: Nolo on April 11, 2013, 02:10:13 PM

Quote from: wmikrut on April 11, 2013, 02:09:27 PM

Looks like (according to P2Pool) -- the blocks seem to all be coming from:
216.69.248.251,9323

Sorry wmikrut. I was wrong in the other thread.

No need to apologize!
I appreciate the response.

celkaris

full member

Activity: 148

Merit: 100

Quote from: wmikrut on April 11, 2013, 02:09:27 PM

Looks like (according to P2Pool) -- the blocks seem to all be coming from:
216.69.248.251,9323

if blocks were generated with p2pool we would see two distinct things:

- p2pool author pubkey / transaction in outputs

- multiple outputs, to addresses belonging to share owners

i doubt he uses p2pool (how would he alter remote existing p2pool installations by the way)

Nolo

hero member

Activity: 686

Merit: 500

Whoa, there are a lot of cats in this wall.

Quote from: wmikrut on April 11, 2013, 02:09:27 PM

Looks like (according to P2Pool) -- the blocks seem to all be coming from:
216.69.248.251,9323

Sorry wmikrut. I was wrong in the other thread.

wmikrut

hero member

Activity: 631

Merit: 501

Looks like (according to P2Pool) -- the blocks seem to all be coming from:
216.69.248.251,9323

celkaris

full member

Activity: 148

Merit: 100

Quote from: Syke on April 11, 2013, 01:56:13 PM

And there they are. Blocks 103018 at 18:52 through 103036 at 19:11. Actual clock is only 18:57. He's generating blocks ahead of time, and into the future.

this is supported by the protocol, but indeed, the averaging function should proceed those in another way i guess.
I reported the first block with a future ntime to devs, asking how would this affect the diff (magically he first used +15 mins, that's how i saw hit while looking at how frequent blocks were mined).

The real problem here i guess, is that that guy is able to mine multiple blocks one after the other, obviously this finally alters the averaged data and triggers the diff increase.

Syke

legendary

Activity: 3878

Merit: 1193

And there they are. Blocks 103018 at 18:52 through 103036 at 19:11. Actual clock is only 18:57. He's generating blocks ahead of time, and into the future.

Topic: [TRC] [DISCLOSURE] Terracoin Difficulty Collapse Exploit - page 2. (Read 10180 times)