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Topic: Counter Entropy ? (Read 1312 times)

member
Activity: 107
Merit: 10
August 15, 2014, 04:02:34 PM
#13
No real entropy in a computer everything is deterministic

mouse movings...
key presses...
http://en.wikipedia.org/wiki/RdRand

Not true random if it has a pattern its not trully random its pseudorandom
legendary
Activity: 1260
Merit: 1019
August 15, 2014, 04:00:36 PM
#12
No real entropy in a computer everything is deterministic

mouse movings...
key presses...
http://en.wikipedia.org/wiki/RdRand
sr. member
Activity: 266
Merit: 250
August 15, 2014, 03:55:24 PM
#11
How come entropy is related to Bitcoin ? Roll Eyes

Because private keys are randomly generated.  It is important that the key not be predictable:
http://en.wikipedia.org/wiki/Entropy_%28computing%29

AFAIK real entropy can take place only in real world. Inside computer n/w everything is a product of a pattern (even the PRNG). How can we xpect real entropy in a computer ?

But don't really good entropy systems TAKE the entropy from the "real world" you're referring to? As in noise and such.
member
Activity: 107
Merit: 10
August 15, 2014, 03:52:42 PM
#10
No real entropy in a computer everything is deterministic
full member
Activity: 214
Merit: 278
August 15, 2014, 02:43:33 PM
#9
AFAIK real entropy can take place only in real world. Inside computer n/w everything is a product of a pattern (even the PRNG). How can we xpect real entropy in a computer ?

http://en.wikipedia.org/wiki/Entropy_%28computing%29


At the top of the article, it is written that This article needs attention from an expert in Cryptography. So, can we trust what is written in this article ?
legendary
Activity: 3388
Merit: 4615
April 17, 2014, 09:53:57 AM
#8
AFAIK real entropy can take place only in real world. Inside computer n/w everything is a product of a pattern (even the PRNG). How can we xpect real entropy in a computer ?

http://en.wikipedia.org/wiki/Entropy_%28computing%29
legendary
Activity: 1789
Merit: 1008
Keep it dense, yeah?
April 13, 2014, 06:54:49 PM
#7
How come entropy is related to Bitcoin ? Roll Eyes

Cryptography is all about entropy, real entropy is the basis for sound key generation.
full member
Activity: 214
Merit: 278
April 13, 2014, 03:23:12 PM
#6
Uhm... A little vague?

I think people might be able to help you if you actually gave some more details. I'm very uncertain what to make of your post.

Quote
If you're using private keys generated from standard pseudorandom sequence of numbers generated in programming languages like C or C++, the total possible number of private keys that can be generated that way is: 4294967296 (if you're using programs written in Java, the number is: 281474976710656).

Source: https://www.offlineaddress.com/?site=about#security-risk

Moreover, 1/100 probability does not mean the collision will be at 100th time. It may happen at 1st time as well.

So, can reverse engineering this public/private combination possible ?

I have encountered a new kind of randomness in bitaddress.org. It is based on mouse movement. Do u people think it makes thing difficult or easier ?

Most well written bitcoin wallets use programming that provides a bit less than 1.16X1077 possible private keys. Therefore the probability of collision is much closer to 0% than you imagine.



From a i/p of n how come some software provide n^x entropy w/o using any 3rd random salt ?
legendary
Activity: 3388
Merit: 4615
April 12, 2014, 07:03:24 PM
#5
How come entropy is related to Bitcoin ? Roll Eyes

Because private keys are randomly generated.  It is important that the key not be predictable:
http://en.wikipedia.org/wiki/Entropy_%28computing%29
legendary
Activity: 3388
Merit: 4615
April 12, 2014, 05:38:25 PM
#4
Uhm... A little vague?

I think people might be able to help you if you actually gave some more details. I'm very uncertain what to make of your post.

Quote
If you're using private keys generated from standard pseudorandom sequence of numbers generated in programming languages like C or C++, the total possible number of private keys that can be generated that way is: 4294967296 (if you're using programs written in Java, the number is: 281474976710656).

Source: https://www.offlineaddress.com/?site=about#security-risk

Moreover, 1/100 probability does not mean the collision will be at 100th time. It may happen at 1st time as well.

So, can reverse engineering this public/private combination possible ?

I have encountered a new kind of randomness in bitaddress.org. It is based on mouse movement. Do u people think it makes thing difficult or easier ?

Most well written bitcoin wallets use programming that provides a bit less than 1.16X1077 possible private keys. Therefore the probability of collision is much closer to 0% than you imagine.

full member
Activity: 214
Merit: 278
April 12, 2014, 01:04:03 PM
#3
Uhm... A little vague?

I think people might be able to help you if you actually gave some more details. I'm very uncertain what to make of your post.

Quote
If you're using private keys generated from standard pseudorandom sequence of numbers generated in programming languages like C or C++, the total possible number of private keys that can be generated that way is: 4294967296 (if you're using programs written in Java, the number is: 281474976710656).

Source: https://www.offlineaddress.com/?site=about#security-risk

Moreover, 1/100 probability does not mean the collision will be at 100th time. It may happen at 1st time as well.

So, can reverse engineering this public/private combination possible ?

I have encountered a new kind of randomness in bitaddress.org. It is based on mouse movement. Do u people think it makes thing difficult or easier ?
sr. member
Activity: 336
Merit: 254
CEO of Privex Inc. (www.privex.io)
April 12, 2014, 07:18:23 AM
#2
Uhm... A little vague?

I think people might be able to help you if you actually gave some more details. I'm very uncertain what to make of your post.
full member
Activity: 214
Merit: 278
April 12, 2014, 06:57:48 AM
#1
Reverse engineering possible ?
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