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Terracoin Attack analysis


  • Moderators

    I heard one of the Bitcoiners saying Terracoin had been attacked to death, so I thought it would be cool to analyse. To me it seems the very people who don’t want ACP are breeding it, but hey ho…

    From November 27th 2013, 18th Jan 2014 it would appear that the Terracoin hash rate has varied wildly between it’s previous stable rate of 6 THash/s and a maximum of 34 THash/s.

    This has caused the difficulty to rise from 100 to nearly a 1000. Wheras the hash has rate has now been left at 8 THash/sec. This is equivalent to 500% attack almost exactly, so some block chain manipulation would have been feasible, including re writing history.

    This would also leave a seriously extended block time to the detriment of loyal miners.

    I would assume this was done by pool manipulation, and am not up on how many ASICs this would have taken or the cost of such an exercise. Or whether there is another explanation for the variation, such as exchange prices or automatic pool switching.

    [attachment deleted by admin]

    See:
    [b]https://coinplorer.com/Charts/Difficulty/TRC[/b]


  • Regular Member

    [quote] This is equivalent to 500% attack almost exactly, so some block chain manipulation would have been feasible, including re writing history.[/quote]
    Don’t have any knowledge in this but it seems interesting to know more about it, thanks!


  • Regular Member

    interesting read 😉


  • Moderators

    I was hoping someone would say I was wrong.

    You will need to go to https://coinplorer.com/Charts/Difficulty/TRC

    To see the image of the Chart being analysed.

    All attachments were deleted after 20thJan2014 Feathercoin Forum attack.


  • Team Development

    Is anything happening over at the Terracoin camp?

    They seem to have gone quite after having to go through several hard forks due to poor difficulty implementations and finally fixing the exploit that attackers used to run riot on the chain.

    I’m wondering if they got disheartened by the whole experience, or perhaps I’m simply out of the Terracoin loop.


  • Moderators

    Its still concerning me something similar is happening at Litecoin, their hash has gone down by 30 GHash, wish I could see the hourly chart!

    https://coinplorer.com/Charts/Difficulty/LTC

    The difficulty Litecoin has been left at is for 100 GHash/s Network Rate, but the current Hash is only 72 GHash/s per day.


  • Moderators

    I also cannot understand why our hash rate has gone down?. I note the varying hash is being used? is it being combined with pool DDoS? to drive down the Difficulty?

    https://coinplorer.com/Charts/Difficulty/FTC


  • Regular Member

    [quote name=“wrapper” post=“54971” timestamp=“1390665492”]
    I also cannot understand why our hash rate has gone down?. I note the varying hash is being used? is it being combined with pool DDoS? to drive down the Difficulty?

    https://coinplorer.com/Charts/Difficulty/FTC
    [/quote]

    coin hopping pools.
    Previously when I mine at give-me-coins, I am only averaging at 20-30 FTC daily.

    I am getting 55-80 right now depending on the price, by exchanging the Bitcoins earned for FTC.


  • Moderators

    [quote name=“eaxvac” post=“55300” timestamp=“1390759125”]
    [quote author=wrapper link=topic=7024.msg54971#msg54971 date=1390665492]
    I also cannot understand why our hash rate has gone down?. I note the varying hash is being used? is it being combined with pool DDoS? to drive down the Difficulty?

    https://coinplorer.com/Charts/Difficulty/FTC
    [/quote]

    coin hopping pools.
    Previously when I mine at give-me-coins, I am only averaging at 20-30 FTC daily.

    I am getting 55-80 right now depending on the price, by exchanging the Bitcoins earned for FTC.
    [/quote]

    Sorry to hear that, cheers for the info, Rep+


  • Moderators

    From the 18th to the 27th January the Litecoin Hash rate has reduced drastically from 120 to 60 GHash/s.

    This has left the difficulty at a rate equivelent to 114 GHash/s. Thus punishing loyal Litecoin miners by leaving the difficulty twice as high as it should be.

    https://coinplorer.com/Charts/Difficulty/LTC


  • Regular Member

    [quote name=“wrapper” post=“55370” timestamp=“1390788543”]
    From the 18th to the 27th January the Litecoin Hash rate has reduced drastically from 120 to 60 GHash/s.

    This has left the difficulty at a rate equivelent to 114 GHash/s. Thus punishing loyal Litecoin miners by leaving the difficulty twice as high as it should be.

    https://coinplorer.com/Charts/Difficulty/LTC
    [/quote]

    doesn’t it auto retarget the difficulty?


  • Moderators

    Yes, but the multipool “attack” effect of pool swapping at difficulty change appears massive. Litecoin does not seem to be protected against that, if it is malevolent. I went to look what they say was going on and noticed the Litecoin forum was Capthcha and you had to log in again, so I didn’t see yet.

    Today the Litecoin Hash dropped to 2200, but the difficulty is for a hash rate of 3300. To do this the variation looks over 200%, not just 51%.

    I have outlined how I think it works, as the multipools are trying to maximise their income at the expense of all other miners. They switch coins with a % of the coins hash rate, to mop up coins cheaper at the previous hash rate / difficulty. Then leave before the difficulty change, leaving the loyal miners with extended block times ie all expensive coins.

    Unfortunately for the people getting the coins from the multipool, the pool holder apprears only to deals in Bitcoin, which means they have no interest in wither the coin gets destroyed and all their workers loose their money either. In fact, it would appear to be in their interest, as the workers will have to build up a new coin.


  • Moderators

    It looks like coin hoping pools are being used to “attack” Feathercoin. They have driven the average block time up for loyal miners to 2:45 minutes, whilst generating block of 2:00m at difficulty change for themselves. The fact that these pools pay out less is disturbing, as they should pay more and fraud is illegal in most countries.

    I really hope this is an algorithm and not malevolent, you damage yourself when you try to damage others.

    The granulated difficulty for Feathercoin change is making this harder than Litecoin where 300% attack look like it was mounted. This may be different if the full 70 GHash is used against Feathercoin. How much is this costing?


  • Regular Member

    [quote name=“wrapper” post=“55496” timestamp=“1390838633”]
    It looks like coin hoping pools are being used to “attack” Feathercoin. They have driven the average block time up for loyal miners to 2:45 minutes, whilst generating block of 2:00m at difficulty change for themselves. The fact that these pools pay out less is disturbing, as they should pay more and fraud is illegal in most countries.

    I really hope this is an algorithm and not malevolent, you damage yourself when you try to damage others.

    The granulated difficulty for Feathercoin change is making this harder than Litecoin where 300% attack look like it was mounted. This may be different if the full 70 GHash is used against Feathercoin. How much is this costing?
    [/quote]

    Wouldn’t this be avoided if Feathercoin tries to retarget the difficulty every block?
    I’ll switch back to solo/pool mining if necessary, instead of multipool.


  • Moderators

    That means extra calculations for the miners and a big change that is likely to cause blockchain forks, any solo miners or pools who didn’t change over could be punished, if they end on the wrong blockchain.

    We are proposing testing some things around extending the number of time zones used to calculate the Block average time and the difficulty. In emergency we would issue a hard fork update to all miners.

    Maybe creating a miner alert (pm list) would be good preventative action for a possible hard fork?


  • Moderators

    [quote] Voice of Russia

    However, some say it’s (Feathercoi) is a poorly made copy of Litecoin. We’ve got a comment by one of the administrators at bitcoinexaminer.org, Ian Irving.

    There have been many instances when it’s been subject to various attacks. A lot of people don’t think it’s very stable. Its key feathure is that it’s very fast. [/quote]


  • Moderators

    According to https://coinplorer.com/Charts/Difficulty/FTC

    Feathercoin has been subject to 14 GHash network “attack”, combined with the scams, forum attacks. No coincidence?


  • administrators

    Interesting… Do you have a theory?


  • Moderators

    http://www.youtube.com/watch?v=bTPQKyAq-DM

    The questions are interesting after 45mins onwards especially.

    I have no theory, just watchin some charts. Hoping someone would enlighten me. If there’s a bank robbery going on, its worth having a look.


  • Moderators

    Feathercoin 3.2 GHash /s 01:29am OK so far.