Yeah we just watched a number of the high diff blocks real miners found get washed out by another huge load of 5K difficulty blocks from the attacker.
Basically he can mine blocks faster at 5K than anyone else can possibly compete with, so he has longer block chains to inject into the network at any time.
I can't believe BTC-E still has trading open on TRC right now.
Topic: TERRACOIN ATTACK OVER 1.2TH ATTACK CONFIRMD - page 9. (Read 28159 times)
The timing is not ticking. So the attacker can continue mining at the low difficulty because he fake a special timestamps set. Extremely clever and know the implementation of the diff algorithm.
Maybe the same group that attacked the FTC.
Maybe the same group that attacked the FTC.
Looks like literally thousands of blocks dumped on the chain from the attacker simultaneously.
http://cryptocoinexplorer.com:3750/chain/Terracoin?count=2016&hi=168576
http://cryptocoinexplorer.com:3750/chain/Terracoin?count=2016&hi=168576
Some good comments on this thread, should archive it for future reference since new coins are so common
Hardly a new coins been here for a while.
And for others talking about devs. I wish they would get their acts together and provide more support to their miners seems their never active anywhere.
Aren't most scamcoins past the insta-mine, pump and dump phase. You didn't really think most of these have a future do you?
Nope not all will have a future some but not all. Most of all the new ones are just nothing but pump and dump. TRC, PPC I do not see much of a future with them unless theirs company's taking them on like bitcoin and have something new to offer. If they don't then all I can see for them both is yet another pump dump
Yeah even the gimmicky "we use a different proof of work" coins seem to be losing value, which shouldn't be a surprise since all the gimmicky proofs of work are less efficient than SHA256 so its like hey not only do we have a silly gimmick we are also less efficient, isn't that great, buy us!
-MarkM-
-MarkM-
all we need is sumore SHA256 tribe coins to muddy the waters imho
whoop whoop 
Yeah even the gimmicky "we use a different proof of work" coins seem to be losing value, which shouldn't be a surprise since all the gimmicky proofs of work are less efficient than SHA256 so its like hey not only do we have a silly gimmick we are also less efficient, isn't that great, buy us!
-MarkM-
-MarkM-
Some good comments on this thread, should archive it for future reference since new coins are so common
Hardly a new coins been here for a while.
And for others talking about devs. I wish they would get their acts together and provide more support to their miners seems their never active anywhere.
Aren't most scamcoins past the insta-mine, pump and dump phase. You didn't really think most of these have a future do you?
Some good comments on this thread, should archive it for future reference since new coins are so common
Hardly a new coin. This has been here for a while.
And for others talking about devs. I wish they would get their acts together and provide more support to their miners seems their never active anywhere.
Some good comments on this thread, should archive it for future reference since new coins are so common
Woo! I managed to sell my TRC at the usual rate before the crash!
Have a look at those stats!
http://www.coinwarz.com/cryptocurrency/
Have a look at those stats!
http://www.coinwarz.com/cryptocurrency/
quick look\/FRC looks very undervalued for another SHA-256 type coin!=)
http://www.coinwarz.com/cryptocurrency/coins/freicoin
I see they rejected the checkpoint someone did a pull request on earlier. The "current chain" the exchanges are relying on are, I assume, the one full of the blocks from the attacker...
So the devs are active but either not aware of the problem or actively working against a fix? Not making me feel any better...
I see they rejected the checkpoint someone did a pull request on earlier. The "current chain" the exchanges are relying on are, I assume, the one full of the blocks from the attacker...
Looks like the terracoin repository is now active. Attempted fix put in place at block 175000
https://github.com/terracoin/terracoin/commits/master/src
https://github.com/terracoin/terracoin/commits/master/src
I have a script that queries terracoind every 5 seconds for the current difficulty. If it's below my arbitrary threshold, it calls the cgminer API on my miners (about 200GHps), and has them hop onto mining TRC (solo, using eloipool locally).
It's worked nicely for me for a few months now, to mine when difficulty is low, and then hop off again when it becomes high (contributing to the oscillation effect).
But now that this attack is underway, no more mining for me. All of my mined blocks become orphaned now because the attacker refuses to confirm them.
It's worked nicely for me for a few months now, to mine when difficulty is low, and then hop off again when it becomes high (contributing to the oscillation effect).
But now that this attack is underway, no more mining for me. All of my mined blocks become orphaned now because the attacker refuses to confirm them.
So, what some honest miner(s) can do to help the coin to survive the attack? Mining trc using official client or may be there is some more effective way?
It appears the time lapse attack is more of a bug in the code of terracoin, and would need fixed to prevent this from happening again. There isn't enough legitimate hash power on TRC to just force the attackers out if they are really using 1.2TH or more. Coinotron is by far the biggest pool and only runs about 1/3 that speed typically.
Someone got an ASIC working on TRC?
ASIC works for TRC 'per default'. It's SHA256.
So, what some honest miner(s) can do to help the coin to survive the attack? Mining trc using official client or may be there is some more effective way?
Since TRC is based off the BTC source, is the 6 hour thing something BTC fixed previously that TRC never copied? Or is it a TRC-specific bug?
TRC not only didn't copy the fix, it made it worse. Asymmetrical difficulty changes (where difficulty can go down more than it can go up) allows the attacker to amplify the effects of the attack. No serious crypto-currency can have an asymmetrical difficulty system. It is trivial to exploit.
I happened to speak with gmaxwell and he pointed out it's a timewarp attack:
https://bitcointalksearch.org/topic/blocking-the-time-warp-attack-114751
It's been fixed in Bitcoin.
https://bitcointalksearch.org/topic/blocking-the-time-warp-attack-114751
It's been fixed in Bitcoin.
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