Open challenge by dev of Digitalcoin to 51% DGC?

anderl

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Quote from: thisnewcoin on June 17, 2013, 04:36:55 PM

who opened this challenge? just curious

started with altcoinkiller threatening to attack all altcoins with his "crew" when they come online. claimed to kill PWR. a thread was born and DGC dev challenge altcoinkiller to try to attack DGC. All the gpu chimps fanboys from LTC and or BTC jumped on the bandwagon stating the challenge was open to everyone to attack DGC. Lots of monkey business.

thisnewcoin

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who opened this challenge? just curious

Oldminer

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FiiNALiZE

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Quote from: HuuHachu on June 17, 2013, 03:22:52 PM

Quote from: JasperParsons on June 17, 2013, 03:18:16 PM

Quote from: HuuHachu on June 17, 2013, 03:14:58 PM

Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

At step 9, you indeed need to generate blocks faster than the real network ... That's why you need some horsepower and that's why it is "recommended" to launch a deny of service on the main pools to ease your chance to get a longer blockchain.

I'm not an expert, but I suppose you don't really need 51% of the hashpower ... the more you have, the more likely you will generate a longer blockchain in a given timeframe. At 25% I suppose you can already be considered a threat

At 25% you would have to be VERY lucky to be a threat. You don't want to have too much more than the network so as not to reflect any huge spike in network hash rate when you broadcast your blockchain.

It depends on the number of confirmations doesn't it ?
Also, with coins having very short block-time (12sec, 15sec, 20sec, ...), it also increases your chance to get a "lucky draw" in a given time frame. (And also reduce the time for the pool operators / Internet providers to react to a deny of service)

+1

Which is why I'm not mining any coin with insanely short block times.

HuuHachu

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Quote from: JasperParsons on June 17, 2013, 03:18:16 PM

Quote from: HuuHachu on June 17, 2013, 03:14:58 PM

Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

At step 9, you indeed need to generate blocks faster than the real network ... That's why you need some horsepower and that's why it is "recommended" to launch a deny of service on the main pools to ease your chance to get a longer blockchain.

I'm not an expert, but I suppose you don't really need 51% of the hashpower ... the more you have, the more likely you will generate a longer blockchain in a given timeframe. At 25% I suppose you can already be considered a threat

At 25% you would have to be VERY lucky to be a threat. You don't want to have too much more than the network so as not to reflect any huge spike in network hash rate when you broadcast your blockchain.

It depends on the number of confirmations doesn't it ?
Also, with coins having very short block-time (12sec, 15sec, 20sec, ...), it also increases your chance to get a "lucky draw" in a given time frame. (And also reduce the time for the pool operators / Internet providers to react to a deny of service)

JasperParsons

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Quote from: HuuHachu on June 17, 2013, 03:14:58 PM

Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

At step 9, you indeed need to generate blocks faster than the real network ... That's why you need some horsepower and that's why it is "recommended" to launch a deny of service on the main pools to ease your chance to get a longer blockchain.

I'm not an expert, but I suppose you don't really need 51% of the hashpower ... the more you have, the more likely you will generate a longer blockchain in a given timeframe. At 25% I suppose you can already be considered a threat

At 25% you would have to be VERY lucky to be a threat. You don't want to have too much more than the network so as not to reflect any huge spike in network hash rate when you broadcast your blockchain.

JasperParsons

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Quote from: FiiNALiZE on June 17, 2013, 03:11:51 PM

Quote from: JasperParsons on June 17, 2013, 03:09:33 PM

Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

You're right - don't turn on the slave system until you've disconnected the internet. The client will sync with your main system. (just add connect=192.168.x.x to the config)

There should be another step in between 8 and 9: Get 51% or more of the hashing power of the coin you want to attack.

Otherwise the valid chain will generate blocks faster than you.

That's usually the hard part since most of us don't have $100k+ to spend

Edit: Sorry for not understanding your post since you left the MOST IMPORTANT STEP OUT.

You can 51% Elacoin with about 3x7950. I know quite a few people with 10-20 MH/s each which could kill a good number of the alt-coins tomorrow.

HuuHachu

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Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

At step 9, you indeed need to generate blocks faster than the real network ... That's why you need some horsepower and that's why it is "recommended" to launch a deny of service on the main pools to ease your chance to get a longer blockchain.

I'm not an expert, but I suppose you don't really need 51% of the hashpower ... the more you have, the more likely you will generate a longer blockchain in a given timeframe. At 25% I suppose you can already be considered a threat

FiiNALiZE

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Quote from: JasperParsons on June 17, 2013, 03:09:33 PM

Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

You're right - don't turn on the slave system until you've disconnected the internet. The client will sync with your main system. (just add connect=192.168.x.x to the config)

There should be another step in between 8 and 9: Get 51% or more of the hashing power of the coin you want to attack.

Otherwise the valid chain will generate blocks faster than you.

That's usually the hard part since most of us don't have $100k+ to spend

Edit: Sorry for not understanding your post since you left the MOST IMPORTANT STEP OUT.

JasperParsons

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Activity: 32

Merit: 0

Quote from: FiiNALiZE on June 17, 2013, 03:07:08 PM

Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

You're right - don't turn on the slave system until you've disconnected the internet. The client will sync with your main system. (just add connect=192.168.x.x to the config)

EDIT: 51% attack implies 51% of the hashing power. Sorry for not making this even more brainless.

FiiNALiZE

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Yes but your other computer on the LAN is connected to the network so it'll see you already spent your coins.

If disconnect both, in order to get a longer blockchain, you'll have to generate blocks; good luck with that.

BTC difficulty is currently 19,339,258.

You'd need to have 51% of the hashing power, hence why it's called the 51% attack.

You kinda left that step out.

cp1

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Stop using branwallets

Quote from: FiiNALiZE on June 17, 2013, 02:53:42 PM

How exactly will you have a longer blockchain if you rewrite your synced blockchain with an older one?

The older one will not contain the transaction to the exchange, true, but once it updates and syncs, your client will see you already spent your coins.

What exactly are you trying to prove here?

Dude trust me, if it was that easy, crypto would not exist anymore.

It's in step 9

FiiNALiZE

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Quote from: JasperParsons on June 17, 2013, 02:46:53 PM

You're wrong. You have the longer blockchain which doesn't contain the transaction to the exchange. Your blockchain gets accepted by the network.

How exactly will you have a longer blockchain if you rewrite your synced blockchain with an older one?

The older one will not contain the transaction to the exchange, true, but once it updates and syncs, your client will see you already spent your coins.

What exactly are you trying to prove here?

Dude trust me, if it was that easy, crypto would not exist anymore.

R-T-B

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I don't even have to understand the protocol fully to understand that's complete BS.

JasperParsons

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Quote from: FiiNALiZE on June 17, 2013, 02:44:06 PM

Quote from: JasperParsons on June 17, 2013, 02:36:51 PM

Quote from: anderl on June 17, 2013, 02:30:20 PM

Quote from: FiiNALiZE on June 17, 2013, 02:25:12 PM

Quote from: JasperParsons on June 17, 2013, 02:23:23 PM

Quote from: defaced on June 17, 2013, 02:07:53 PM

Quote from: anderl on June 17, 2013, 01:42:08 PM

man talk about transference of aggression. BTC and LTC prices collapse, mining profits shrink to meager gains and all that pent up rage is looking for a target. epens that small?

shhh dont taunt them, that will make them angrier.

Instead of attacking coins, why dont they just spend the same time and effort supporting the coin they like by creating products/services and other interesting places to spend them?

Because attacking coins is quick, brainless, and yields instant profit.

It's certainly not brainless.

You have to know what you're doing to attack a coin.

or follow a tutorial Grin

1. Sync client with network
2. Backup %appdata/coin_directory
3. Send coins to exchange and wait for 1 confirmation
4. Close client. Disconnect internet.
5. Overwrite %appdata/coin_directory with the backup
6. Launch client.
7. Create new receiving address.
8. Send all your coins to your new address
9. Wait for transaction to be confirmed and you have found more blocks than the real world network
10. Reconnect internet.

Your coins are at the exchange, but still in your wallet as well.

Oh, and you need another machine on your LAN running the client as well. (you need at least one connection to anyone to mine)

/facepalm

Your transaction is recorded onto the blockchain so when you overwrite with your previous file, you won't be able to spend them.

Your client will see you already spent those coins and they'll disappear once your blockchain updates.

You're wrong. You have the longer blockchain which doesn't contain the transaction to the exchange. Your blockchain gets accepted by the network.

FiiNALiZE

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Quote from: JasperParsons on June 17, 2013, 02:36:51 PM

Quote from: anderl on June 17, 2013, 02:30:20 PM

Quote from: FiiNALiZE on June 17, 2013, 02:25:12 PM

Quote from: JasperParsons on June 17, 2013, 02:23:23 PM

Quote from: defaced on June 17, 2013, 02:07:53 PM

Quote from: anderl on June 17, 2013, 01:42:08 PM

man talk about transference of aggression. BTC and LTC prices collapse, mining profits shrink to meager gains and all that pent up rage is looking for a target. epens that small?

shhh dont taunt them, that will make them angrier.

Instead of attacking coins, why dont they just spend the same time and effort supporting the coin they like by creating products/services and other interesting places to spend them?

Because attacking coins is quick, brainless, and yields instant profit.

It's certainly not brainless.

You have to know what you're doing to attack a coin.

or follow a tutorial Grin

1. Sync client with network
2. Backup %appdata/coin_directory
3. Send coins to exchange and wait for 1 confirmation
4. Close client. Disconnect internet.
5. Overwrite %appdata/coin_directory with the backup
6. Launch client.
7. Create new receiving address.
8. Send all your coins to your new address
9. Wait for transaction to be confirmed and you have found more blocks than the real world network
10. Reconnect internet.

Your coins are at the exchange, but still in your wallet as well.

Oh, and you need another machine on your LAN running the client as well. (you need at least one connection to anyone to mine)

/facepalm

Your transaction is recorded onto the blockchain so when you overwrite with your previous file, you won't be able to spend them.

Your client will see you already spent those coins and they'll disappear once your blockchain updates.

JasperParsons

newbie

Activity: 32

Merit: 0

Quote from: anderl on June 17, 2013, 02:30:20 PM

Quote from: FiiNALiZE on June 17, 2013, 02:25:12 PM

Quote from: JasperParsons on June 17, 2013, 02:23:23 PM

Quote from: defaced on June 17, 2013, 02:07:53 PM

Quote from: anderl on June 17, 2013, 01:42:08 PM

man talk about transference of aggression. BTC and LTC prices collapse, mining profits shrink to meager gains and all that pent up rage is looking for a target. epens that small?

shhh dont taunt them, that will make them angrier.

Instead of attacking coins, why dont they just spend the same time and effort supporting the coin they like by creating products/services and other interesting places to spend them?

Because attacking coins is quick, brainless, and yields instant profit.

It's certainly not brainless.

You have to know what you're doing to attack a coin.

or follow a tutorial Grin

1. Sync client with network
2. Backup %appdata/coin_directory
3. Send coins to exchange and wait for 1 confirmation
4. Close client. Disconnect internet.
5. Overwrite %appdata/coin_directory with the backup
6. Launch client.
7. Create new receiving address.
8. Send all your coins to your new address
9. Wait for transaction to be confirmed and you have found more blocks than the real world network
10. Reconnect internet.

Your coins are at the exchange, but still in your wallet as well.

Oh, and you need another machine on your LAN running the client as well. (you need at least one connection to anyone to mine)

FiiNALiZE

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Activity: 868

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Quote from: LosingAlpha on June 17, 2013, 02:30:12 PM

Quote from: FiiNALiZE on June 17, 2013, 02:25:12 PM

It's certainly not brainless.

You have to know what you're doing to attack a coin.

I thought the stated plan was just to DDoS the big pools and use somebody else's exploit? That's script kiddie level stuff - it's got amateur hour written all over it.

You'd have to find a botnet first

And who said anything about using someone else's exploit?

If it was that easy every alt would have been attacked already.

anderl

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Activity: 714

Merit: 500

Quote from: FiiNALiZE on June 17, 2013, 02:25:12 PM

Quote from: JasperParsons on June 17, 2013, 02:23:23 PM

Quote from: defaced on June 17, 2013, 02:07:53 PM

Quote from: anderl on June 17, 2013, 01:42:08 PM

man talk about transference of aggression. BTC and LTC prices collapse, mining profits shrink to meager gains and all that pent up rage is looking for a target. epens that small?

shhh dont taunt them, that will make them angrier.

Instead of attacking coins, why dont they just spend the same time and effort supporting the coin they like by creating products/services and other interesting places to spend them?

Because attacking coins is quick, brainless, and yields instant profit.

It's certainly not brainless.

You have to know what you're doing to attack a coin.

or follow a tutorial Grin

LosingAlpha

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Activity: 189

Merit: 100

Quote from: FiiNALiZE on June 17, 2013, 02:25:12 PM

It's certainly not brainless.

You have to know what you're doing to attack a coin.

I thought the stated plan was just to DDoS the big pools and use somebody else's exploit? That's script kiddie level stuff - it's got amateur hour written all over it.

Topic: Open challenge by dev of Digitalcoin to 51% DGC? (Read 1582 times)