Information on attacks
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If the value of Feathercoin was left up to a few guys chatting it up on a message board, we’d all be screwed. :)
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I vote the attacker was bored.
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Are there any protocols in development that could prevent 51% control of a coin?
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[quote name=“Entimp” post=“12301” timestamp=“1370858190”]
Are there any protocols in development that could prevent 51% control of a coin?
[/quote]Install v0.6.4.1 of the client with checkpoints introduced.
[url=https://forum.feathercoin.com/index.php?topic=1525.0]Feathercoin 0.6.4.1 Released - Checkpoints Added[/url]
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The problem of FTC and all the other scrypt based coins is that they use an identical hashing algorithm.
How about we [i]slightly[/i] modify this algorithm, to make it impossible for attackers to simply switch an LTC, WDC, CNC,etc. pool to FTC?
Plus create a fork of cgminer - or talk to ckolivas to include our new hashing algorithm in cgminer. -
[quote name=“Radacoin” post=“12314” timestamp=“1370859787”]
The problem of FTC and all the other scrypt based coins is that they use an identical hashing algorithm.How about we [i]slightly[/i] modify this algorithm, to make it impossible for attackers to simply switch an LTC, WDC, CNC,etc. pool to FTC?
Plus create a fork of cgminer - or talk to ckolivas to include our new hashing algorithm in cgminer.
[/quote]No. Because they would have the hashrate anyway and could just get the new miner.
Hashrate power is not the problem. Surprise hashrate power is the problem. Merged mining would be a boost to FTC if we got it.
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[quote name=“zerodrama” post=“12434” timestamp=“1370875079”]
[quote author=Radacoin link=topic=853.msg12314#msg12314 date=1370859787]
The problem of FTC and all the other scrypt based coins is that they use an identical hashing algorithm.How about we [i]slightly[/i] modify this algorithm, to make it impossible for attackers to simply switch an LTC, WDC, CNC,etc. pool to FTC?
Plus create a fork of cgminer - or talk to ckolivas to include our new hashing algorithm in cgminer.
[/quote]No. Because they would have the hashrate anyway and could just get the new miner.
[/quote]Wait! Do you think an individual / group can put something like 500 MH/s at FTC?
I thought it’s maybe a rogue pool operator (or a group of pool operators) that redirect hashes from LTC, WDC, DGC, etc. to attack FTC.
I mean for a big LTC pool with 2000 MH/s, redirecting 500 MH/s for 1/2 days or so isn’t that much of a problem. Many people won’t notice they got paid out 15% less on a specific day. And the pool operator can always say it was temporary problems with the pool software, an update that took longer than expected … something like that.
We are looking for
- someone that has the hashing power
- someone that suffers if LTC looses miners / supporters / value.
imho one of the big LTC pool operators is behind this attack.
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[quote name=“Radacoin” post=“12440” timestamp=“1370876123”]
[quote author=zerodrama link=topic=853.msg12434#msg12434 date=1370875079]
[quote author=Radacoin link=topic=853.msg12314#msg12314 date=1370859787]
The problem of FTC and all the other scrypt based coins is that they use an identical hashing algorithm.How about we [i]slightly[/i] modify this algorithm, to make it impossible for attackers to simply switch an LTC, WDC, CNC,etc. pool to FTC?
Plus create a fork of cgminer - or talk to ckolivas to include our new hashing algorithm in cgminer.
[/quote]No. Because they would have the hashrate anyway and could just get the new miner.
[/quote]Wait! Do you think an individual / group can put something like 500 MH/s at FTC?
I thought it’s maybe a rogue pool operator (or a group of pool operators) that redirect hashes from LTC, WDC, DGC, etc. to attack FTC.
I mean for a big LTC pool with 2000 MH/s, redirecting 500 MH/s for 1/2 days or so isn’t that much of a problem. Many people won’t notice they got paid out 15% less on a specific day. And the pool operator can always say it was temporary problems with the pool software, an update that took longer than expected … something like that.
We are looking for
- someone that has the hashing power
- someone that suffers if LTC looses miners / supporters / value.
imho one of the big LTC pool operators is behind this attack.
[/quote]Or a rogue pool that isn’t even listed.
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Successful attack was successful. Difficulty just went down when it was supposed to rise.
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[quote name=“ASDASDASD” post=“12469” timestamp=“1370877475”]
Successful attack was successful. Difficulty just went down when it was supposed to rise.
[/quote]unless the system is completely broken the system will adjust the diff back up in a few hours
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:)
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[quote name=“zerodrama” post=“12445” timestamp=“1370876497”]
Or a rogue pool that isn’t even listed.
[/quote]I don’t believe in conspiracy theories, secret societies - and “unlisted pools”. People always have the need to talk. Can’t keep such things secret.
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[quote name=“ASDASDASD” post=“12469” timestamp=“1370877475”]
Successful attack was successful. Difficulty just went down when it was supposed to rise.
[/quote]This was really nifty how they did this.
It took less than than the target time to get to the next difficulty adjust so the difficulty should have gone up. Because the attacker overwrote the starting block with one from a day before it looked to the network like it took an extra day. This made the difficulty go down.
This is the first time that I have ever seen this sort of attack. We currently have an unexpected easy batch of coins to mine. Perhaps this is the attackers way of compensating miners for the orphaned blocks :)
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[quote name=“Bushstar” post=“12504” timestamp=“1370891673”]
This was really nifty how they did this.It took less than than the target time to get to the next difficulty adjust so the difficulty should have gone up. Because the attacker overwrote the starting block with one from a day before it looked to the network like it took an extra day. This made the difficulty go down.
This is the first time that I have ever seen this sort of attack. We currently have an unexpected easy batch of coins to mine. Perhaps this is the attackers way of compensating miners for the orphaned blocks :)
[/quote]I tried to say it yesterday (it was not received well) but you said it far better than I.
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Haha well, the attacker(s) helped get us a lot of attention, now we must capitalize on that attention. Plus, they have not achieved their goal, Feathercoin is still alive and kicking.
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[quote name=“meetrat1” post=“12509” timestamp=“1370893241”]
Haha well, the attacker(s) helped get us a lot of attention, now we must capitalize on that attention. Plus, they have not achieved their goal, Feathercoin is still alive and kicking.
[/quote]+1
We really should capitalize on that! Not many coins survived such attacks.
“51% attack” sounds pretty cool for some media noobs. Maybe they can write a story about that - and mention “Feathercoin” a few times.
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There is a Coindesk article on the attacks today. I spoke to Danny the interviewer earlier today.
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[quote name=“ASDASDASD” post=“12469” timestamp=“1370877475”]
Successful attack was successful. Difficulty just went down when it was supposed to rise.
[/quote]The difficulty was NOT SUPPOSED to rise. That prediction was based on 60 blocks. 47 was based on 504 blocks.
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[quote name=“erk” post=“12574” timestamp=“1370899513”]
Can we get the IP address of the attacker that submitted the fake blocks please?I don’t know how to extract it from the chain.
It would also be nice to know which hosts first accepted the bogus chain.
[/quote]You can’t. Thats the whole point with Cryptocurrency.
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[quote name=“erk” post=“12614” timestamp=“1370903970”]
[quote author=Magic8Ball link=topic=853.msg12598#msg12598 date=1370902150]
[quote author=erk link=topic=853.msg12574#msg12574 date=1370899513]
Can we get the IP address of the attacker that submitted the fake blocks please?I don’t know how to extract it from the chain.
It would also be nice to know which hosts first accepted the bogus chain.
[/quote]You can’t. Thats the whole point with Cryptocurrency.[/quote]
Nonsense, the BTC block chain explorer has IP and Whois information for every transaction, is just that the feature has been omitted from the FTC explorer.
[/quote]It can be implemented, but I doubt it’s going to help us. Block orphaning isn’t illegal. I know the attackers took their hash rate from the Litecoin network. It can be narrowed down to particular pools and maybe even particular top miners. We cannot terrorise them, they cannot destroy us, so let’s live with it. More we succeed, more they suffer.
