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Topic: Illegal content in the blockchain - page 3. (Read 23543 times)

legendary
Activity: 1008
Merit: 1001
Let the chips fall where they may.
July 22, 2011, 03:49:48 PM
#83
Aren't the vents for the circuits and perhaps the motor coils?

My guess: Air bearings
sr. member
Activity: 392
Merit: 250
July 22, 2011, 03:30:45 PM
#82
Hmmm, evil plan fail breakdown:

1. too many miners, MUST LOWER MINER COUNT!

2. think up stupid but seemingly clever plan to get miners to stop

3. implement plan on teh forumz, oh teh horrorz

4. FAIL to realize that most bitcoin miners are extremely smart.

PLAN FAIL!
sr. member
Activity: 280
Merit: 250
July 22, 2011, 03:25:32 PM
#81
I'm pretty sure the police are busy with other things..you know like murders and stuff. The police don't even know what Bitcoins is..and they probably don't care.
hero member
Activity: 616
Merit: 500
Firstbits.com/1fg4i :)
July 22, 2011, 03:13:37 PM
#80
Aren't the vents for the circuits and perhaps the motor coils?
legendary
Activity: 1008
Merit: 1001
Let the chips fall where they may.
July 22, 2011, 12:16:49 PM
#79

However, aren't hard disks sealed to partial vacuum?.


I suppose there may exist some hard disks designed to operate in a partial vacuum, but those would not include cheap consumer disks. The top plate is too thin to hold a substantial vacuum. I have seen some disks with vent holes you are not supposed to cover.

Specifically the Western Digital WD1600AAJB. Maximum operating altitude: 10,000 feet (3,050m) (using WD1600AB specifications)
sr. member
Activity: 308
Merit: 250
July 22, 2011, 12:04:59 PM
#78
I was thinking maybe it was a meta suggestion: exit the thread without writing to it Smiley

Actually I believe it was a geeky suggestion to blank this entire thread and nothing of value would be lost.
member
Activity: 70
Merit: 10
GNU is not UNIX
July 22, 2011, 12:02:52 PM
#77
It's a source of pseudorandom numbers which are a function of the state of your machine. Actually, absolutely everything a deterministic computer does is a function of it's state, hence it don't have much sense to say /dev/urandom is a function.
The output of /dev/urandom is typically non-deterministic. It's a function of the entropy pool's state, but that state itself is non-deterministic.

Entropy sources include the clock skew between the CPU's clock source and the network interface's clock source. This is dependent on microscopic zone temperature variations in the quartz crystals which is believed to be truly random. Another source is the timing of data arriving from the hard disk measured by the CPU instruction cycle counter. This is affected by turbulent boundary shear between the hard drive surface and the air around it. This is also believed to be truly random.

Real-world computers are not deterministic computers.

Right, I'm about to correct my comment.

However, aren't hard disks sealed to partial vacuum?.
legendary
Activity: 1008
Merit: 1001
Let the chips fall where they may.
July 22, 2011, 11:59:21 AM
#76
Okay, went and tested it: the '>' command overwrites the file; data or not.

You would use the append command ('>>')to avoid overwriting the file.

I was thinking maybe it was a meta suggestion: exit the thread without writing to it Smiley
hero member
Activity: 532
Merit: 500
FIAT LIBERTAS RVAT CAELVM
July 22, 2011, 01:55:56 AM
#75
Try that with a test file. It will exit immediately without writing anything.

So close, and yet... so very, very far away.
legendary
Activity: 1008
Merit: 1001
Let the chips fall where they may.
July 22, 2011, 01:26:49 AM
#74
Try that with a test file. It will exit immediately without writing anything.
hero member
Activity: 532
Merit: 500
FIAT LIBERTAS RVAT CAELVM
full member
Activity: 140
Merit: 100
July 21, 2011, 11:54:21 PM
#72
cat /dev/null > thisthread
legendary
Activity: 1008
Merit: 1001
Let the chips fall where they may.
July 21, 2011, 10:56:11 PM
#71
...This is affected by turbulent boundary shear between the hard drive surface and the air around it. This is also believed to be truly random.

...

I thought that part of HDDs were evacuated to reduce friction...

No, the heads ride on a cushion of air. It it dust that is removed from the cavity. Dust can cause enough turbulence to cause the heads to crash into the disk surface.

These days, hard-drives auto-park the heads when the power is removed. Hard drives I have taken apart also have dust traps with filters near the edge of the platters.

A little off-topic though.
member
Activity: 98
Merit: 10
firstbits: 1nathana
July 21, 2011, 09:27:42 PM
#70
...


If someone printed kiddyporn in a 100 dollars bill and you got paid with it, do you need to burn your money?
Note: If you put anything on currency and try to use it, then it is defaced. You should not accept his money, because he invalidated it by printing something on it. I know I ruin your point by saying this.

...

Isn't a note still valid if the defacement compromises less than a certain percentage of the note? I see all sorts of dirty notes in circulation, coffee stains, tears, and even plain aging in general; just print using a UV lasers (accelerating aging selectively) or putting coffee inside the printer's ink cartridge.
I think the law says something along the line of if it makes it unfit to reissue. Printing CP on it in any manner would do this.
hero member
Activity: 616
Merit: 500
Firstbits.com/1fg4i :)
July 21, 2011, 09:07:04 PM
#69
...This is affected by turbulent boundary shear between the hard drive surface and the air around it. This is also believed to be truly random.

...

I thought that part of HDDs were evacuated to reduce friction...
hero member
Activity: 616
Merit: 500
Firstbits.com/1fg4i :)
July 21, 2011, 09:03:00 PM
#68
...


If someone printed kiddyporn in a 100 dollars bill and you got paid with it, do you need to burn your money?
Note: If you put anything on currency and try to use it, then it is defaced. You should not accept his money, because he invalidated it by printing something on it. I know I ruin your point by saying this.

...

Isn't a note still valid if the defacement compromises less than a certain percentage of the note? I see all sorts of dirty notes in circulation, coffee stains, tears, and even plain aging in general; just print using a UV lasers (accelerating aging selectively) or putting coffee inside the printer's ink cartridge.
legendary
Activity: 1596
Merit: 1012
Democracy is vulnerable to a 51% attack.
July 21, 2011, 08:43:47 PM
#67
It's a source of pseudorandom numbers which are a function of the state of your machine. Actually, absolutely everything a deterministic computer does is a function of it's state, hence it don't have much sense to say /dev/urandom is a function.
The output of /dev/urandom is typically non-deterministic. It's a function of the entropy pool's state, but that state itself is non-deterministic.

Entropy sources include the clock skew between the CPU's clock source and the network interface's clock source. This is dependent on microscopic zone temperature variations in the quartz crystals which is believed to be truly random. Another source is the timing of data arriving from the hard disk measured by the CPU instruction cycle counter. This is affected by turbulent boundary shear between the hard drive surface and the air around it. This is also believed to be truly random.

Real-world computers are not deterministic computers.
legendary
Activity: 1862
Merit: 1105
WalletScrutiny.com
July 21, 2011, 08:37:55 PM
#66
how do others handle this? you can always generate illegal content where numbers are involved. a bank would also not rearrange transactions just because they represent evil data although that evil data would end up at the recipient of the payments and stay stored at the bank.
member
Activity: 98
Merit: 10
firstbits: 1nathana
July 21, 2011, 07:37:15 PM
#65
Person A decides to sell off his old hard drive. Before he sells it, he makes some "random" data by making a disk image the size of the drive full of kiddie porn and then encrypts it with 20 minutes of 'cat /dev/urandom'.

You lost me here. Isn't /dev/urandom a one-way function?

I recently bought a 500GB hard-drive used. Spent 25 hours overwriting it with /dev/urandom (CPU bound). I then spent 5 hours overwriting with /dev/zero (I/O Bound).

Without the "Key" you can't prove whether something is data or meaningless noise.

I meant using a chunk of output from /dev/urandom of the same size as the yet-to-be-encrypted files as the encryption key. And the point is, even if person B checked, it would look like someone used a DBAN disk on it. And the point of the /dev/urandom output as a key is that it would extremely secure, yet person C would presumably have the key, because Person A planed this with malicious intent.

If someone printed kiddyporn in a 100 dollars bill and you got paid with it, do you need to burn your money?
Note: If you put anything on currency and try to use it, then it is defaced. You should not accept his money, because he invalidated it by printing something on it. I know I ruin your point by saying this.

Person A decides to sell off his old hard drive. Before he sells it, he makes some "random" data by making a disk image the size of the drive full of kiddie porn and then encrypts it with 20 minutes of 'cat /dev/urandom'.

You lost me here. Isn't /dev/urandom a one-way function?

It's a source of pseudorandom numbers which are a function of the state of your machine. Actually, absolutely everything a deterministic computer does is a function of it's state, hence it don't have much sense to say /dev/urandom is a function.


This. And im pretty sure, due to the method it gets the numbers, it is completely random. It does use environmental noise.
member
Activity: 70
Merit: 10
GNU is not UNIX
July 21, 2011, 07:32:12 PM
#64
Person A decides to sell off his old hard drive. Before he sells it, he makes some "random" data by making a disk image the size of the drive full of kiddie porn and then encrypts it with 20 minutes of 'cat /dev/urandom'.

You lost me here. Isn't /dev/urandom a one-way function?

It's a source of pseudorandom numbers which are a function of the state of your machine. Actually, absolutely everything a deterministic computer does is a function of it's state, hence it don't have much sense to say /dev/urandom is a function.
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