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Topic: Blockchain.info misreports origins (Was:Swiss University jumps into mining game) - page 4. (Read 21274 times)

legendary
Activity: 2856
Merit: 1520
Bitcoin Legal Tender Countries: 2 of 206
Maybe they have tons of fpga unused? They talked about cheap double spending. I don't know how they accounted for 10% of the network power in a "cheap" way.

Maybe they have access to supercomputers we can only dream off.

They are 500Km away, I should go there and investigate Cheesy

give em a call, fake a Swiss accent and they won't even know you are from the internet Wink

did you ever tried to fake a swiss accent? very impossible! they have different accent in every canton and every village. bad idea!  Grin

In that case just choke up as many croutons from the back of your throat as possible and say you come from the most backward village of them all!

bad idea too! I dont want to get a bullet in my head!  Roll Eyes they get their army gun to home if they leave the regular army service but without cartridges. some years ago they had to give back the cartridges from home. but I do not trust in that!  Wink

EDIT: "The structure of the Swiss militia system stipulates that the soldiers keep their own personal equipment, including all personally assigned weapons, at home (until 2007 this also included ammo[3])." http://en.wikipedia.org/wiki/Military_of_Switzerland
http://www.swissinfo.ch/eng/Specials/Gun_debate/Background/Archives/Soldiers_can_keep_guns_at_home_but_not_ammo.html?cid=970614
legendary
Activity: 892
Merit: 1002
1 BTC =1 BTC
Maybe they have tons of fpga unused? They talked about cheap double spending. I don't know how they accounted for 10% of the network power in a "cheap" way.

Maybe they have access to supercomputers we can only dream off.

They are 500Km away, I should go there and investigate Cheesy

give em a call, fake a Swiss accent and they won't even know you are from the internet Wink

did you ever tried to fake a swiss accent? very impossible! they have different accent in every canton and every village. bad idea!  Grin

ok, lol but this is Zurich, north of Swiss, so they speak german...
legendary
Activity: 1022
Merit: 1000
Maybe they have tons of fpga unused? They talked about cheap double spending. I don't know how they accounted for 10% of the network power in a "cheap" way.

Maybe they have access to supercomputers we can only dream off.

They are 500Km away, I should go there and investigate Cheesy

give em a call, fake a Swiss accent and they won't even know you are from the internet Wink

did you ever tried to fake a swiss accent? very impossible! they have different accent in every canton and every village. bad idea!  Grin

In that case just choke up as many croutons from the back of your throat as possible and say you come from the most backward village of them all!
hero member
Activity: 952
Merit: 1009
legendary
Activity: 2856
Merit: 1520
Bitcoin Legal Tender Countries: 2 of 206
Maybe they have tons of fpga unused? They talked about cheap double spending. I don't know how they accounted for 10% of the network power in a "cheap" way.

Maybe they have access to supercomputers we can only dream off.

They are 500Km away, I should go there and investigate Cheesy

give em a call, fake a Swiss accent and they won't even know you are from the internet Wink

did you ever tried to fake a swiss accent? very impossible! they have different accent in every canton and every village. bad idea!  Grin
legendary
Activity: 1176
Merit: 1001
They speak Italian, French and German in Swiss, depending on the region. I think that I should sleek in English, lol.

Why don't we simply email them? Their website => lab email, done.

""How the hell are you mining so fast?Huh"""
legendary
Activity: 1022
Merit: 1000
Maybe they have tons of fpga unused? They talked about cheap double spending. I don't know how they accounted for 10% of the network power in a "cheap" way.

Maybe they have access to supercomputers we can only dream off.

They are 500Km away, I should go there and investigate Cheesy

give em a call, fake a Swiss accent and they won't even know you are from the internet Wink
legendary
Activity: 2044
Merit: 1000
Purchases do not appear to be running at GPUmax.......
legendary
Activity: 1176
Merit: 1001
Maybe they have tons of fpga unused? They talked about cheap double spending. I don't know how they accounted for 10% of the network power in a "cheap" way.

Maybe they have access to supercomputers we can only dream off.

They are 500Km away, I should go there and investigate Cheesy
hero member
Activity: 658
Merit: 500
Jeesus......that is a lot of power to just "flip the switch" on.

I would love to know what they are running. 

gpumax to a solo custom miner?
hero member
Activity: 910
Merit: 1000
Items flashing here available at btctrinkets.com
Jeesus......that is a lot of power to just "flip the switch" on.

I would love to know what they are running. 
+1

Anyone working on this experiment care to elaborate, Im sure one or more of you are on this forum.
legendary
Activity: 1458
Merit: 1006
Unless you have 51% of the whole network's hashing power right?

No, it's still exponentially difficult over larger numbers of blocks. (Page 8 in the Satoshi whitepaper)

Edit: I may have been wrong about this.

The Bitcoin whitepaper doesn't discuss cases where the attacker's mining power is above 0.3

By Satoshi's analysis, doesn't it get exponentially hard for honest miners to catch up to an attacker, if the attacker controls >50% of mining power, not just blocks solved?

Haven't thought much about majority attack feasibility before today.



Thankfully: "[2] In our experiments, we solely used Bitcoin wallets and
accounts that we own; other Bitcoin users were not affected by our experiments."

These guys didn't steal anyone else's money. But there is a flip side to that coin.
legendary
Activity: 2044
Merit: 1000
Jeesus......that is a lot of power to just "flip the switch" on.

I would love to know what they are running. 
legendary
Activity: 1022
Merit: 1000
I dont know whether they mine with full power yet, but its not 51%, its 8.547% actually.


Number of Blocks relayed by 82.130.102.160: 20
First block relayed at Blockheight: 200691
Current Blockheight: 200925
dBlockheight=200925-200691=234 -> they have competed for 234 blocks yet

20/234*100%= 8.547%

They have currently relayed 8.547% of all blocks they have competed for.


what is the timeframe for an 51% attack. 6 blocks?

IIRC, maintaining a supermajority attack gets exponentially hard over n-blocks.

Hence: "Double-Spending Attacks on Fast Payments in Bitcoin"

Unless you have 51% of the whole network's hashing power right?
legendary
Activity: 2856
Merit: 1520
Bitcoin Legal Tender Countries: 2 of 206
Paper will appear:

http://www.syssec.ethz.ch/research/publications

EDIT: "Two Bitcoins at the Price of One? Double-Spending Attacks on Fast Payments in Bitcoin" I'm looking forward to double my bitcoins!  Roll Eyes
legendary
Activity: 1458
Merit: 1006
I dont know whether they mine with full power yet, but its not 51%, its 8.547% actually.


Number of Blocks relayed by 82.130.102.160: 20
First block relayed at Blockheight: 200691
Current Blockheight: 200925
dBlockheight=200925-200691=234 -> they have competed for 234 blocks yet

20/234*100%= 8.547%

They have currently relayed 8.547% of all blocks they have competed for.


what is the timeframe for an 51% attack. 6 blocks?

IIRC, maintaining a supermajority attack gets exponentially hard over n-blocks.

Hence: "Double-Spending Attacks on Fast Payments in Bitcoin"
legendary
Activity: 1022
Merit: 1000
I dont know whether they mine with full power yet, but its not 51%, its 8.547% actually.


Number of Blocks relayed by 82.130.102.160: 20
First block relayed at Blockheight: 200691
Current Blockheight: 200925
dBlockheight=200925-200691=234 -> they have competed for 234 blocks yet

20/234*100%= 8.547%

They have currently relayed 8.547% of all blocks they have competed for.


what is the timeframe for an 51% attack. 6 blocks?

+1
legendary
Activity: 1458
Merit: 1006
Swiss... they have something to defend

Yes. Bitcoin is the new Swiss Bank Account.  Wink

This is not a bad thing. That is a legitimate organization, they are not doing it with hostile intent. Very interesting though!

Of course ETH Zürich is legitimate. However, they could still be Bitcoin hostile.  Smiley

It's a relief to see that this is a research operation. I'd be rather more concerned if this was an unidentified organization with unknown intent.

I was quite astounded to discover that their group (or indeed any organization) was able to roll out enough mining power to find 7 blocks in 70 minutes.

Pretty impressive, if it's just for a feasibility experiment.
legendary
Activity: 2856
Merit: 1520
Bitcoin Legal Tender Countries: 2 of 206
legendary
Activity: 2856
Merit: 1520
Bitcoin Legal Tender Countries: 2 of 206
I dont know whether they mine with full power yet, but its not 51%, its 8.547% actually.


Number of Blocks relayed by 82.130.102.160: 20
First block relayed at Blockheight: 200691
Current Blockheight: 200925
dBlockheight=200925-200691=234 -> they have competed for 234 blocks yet

20/234*100%= 8.547%

They have currently relayed 8.547% of all blocks they have competed for.


what is the timeframe for an 51% attack. 6 blocks?
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