meshcollider

general recent conversations

Temp zkSnark

For discussing crypto.stackexchange.com/questions/98487/…

meshcollider

Feb 20, 2022 07:16

@user93353 Please remember to accept it today before the bounty expires! :)

meshcollider

Feb 19, 2022 05:42

Glad to help, I will look out for your new question if so.

meshcollider

Feb 18, 2022 00:19

No worries :)

meshcollider

Feb 18, 2022 00:19

basically you get a new l(x), different from the one above. But because you compute p(x) = l(x)r(x) - o(x) using the new l(x), it is still equal by definition

meshcollider

Feb 18, 2022 00:18

Sounds good!

meshcollider

Feb 18, 2022 00:17

then you would compute a different p(x), but everything would still verify

meshcollider

Feb 18, 2022 00:17

i.e. changing the second 'a' to be 7 instead of 5

meshcollider

Feb 18, 2022 00:17

but there is nothing stopping you from modifying l(x), for example, to pass through (2,7) instead of (2,5)

meshcollider

Feb 18, 2022 00:16

so it verifies that the l(x)*r(x) - o(x) = 0 at x = 1,2,3

meshcollider

Feb 18, 2022 00:15

which is obviously divisible by (x-1)(x-2)(x-3)

meshcollider

Feb 18, 2022 00:15

Let's just use
a x b = r1
a x c = r2
c x d = r3

5 * 2 = 10
5 * 3 = 15
3 * 1 = 3

Points for l(x) = [(1,5), (2,5), (3,3)]
l(x) = 3 + 3 x - x^2

Points for r(x) = [(1,2), (2,3), (3,1)]
r(x) = (11 x - 4 - 3 x^2 )/2

Points of o(x) = [(1,10), (2,15), (3,3)]
o(x) = (61 x - 24 - 17 x^2)/2

Then l(x)*r(x) - o(x) =
(3 x - 2) (x - 1) (x - 2) (x - 3) / 2

meshcollider

Feb 18, 2022 00:03

Where did the 2 x 1 x 3 x 2 come from? I don't remember seeing that

meshcollider

Feb 18, 2022 00:02

to get a non-trivial example, I think you'd need to introduce another random constraint

meshcollider

Feb 18, 2022 00:02

I think that with just two constraints like that, p(x) will always be 0 after using lagrange interpolation

Discussion on answer by kelalaka: Has…

Imported from a comment discussion on crypto.stackexchange.com...

meshcollider

Jan 31, 2022 10:48

I wonder if this is possible using, say, a chameleon hash? Or a non-cryptographic hash function. The question doesn't specify it must be cryptographic.

The Side Channel

Mostly randomly generated noise. – crypto.stackexchange.com

meshcollider

Jan 25, 2022 01:49

Maybe it is just a January thing, I guess bitcoin has felt quite quiet too recently

meshcollider

Jan 25, 2022 01:47

41% more votes on bitcoin this year, for comparison. Idk, just feels quite quiet

meshcollider

Jan 24, 2022 22:58

Very unusual to see 0 or 1 votes on most questions and answers

meshcollider

Jan 24, 2022 22:57

I must say, crypto.SE seems to be really afraid of voting compared to other SE sites 😂

mempool

A place to chat about the Bitcoin Stackexchange, Bitcoin in ge...

MeshCollider

Apr 23, 2018 04:31

@Jannes Please see my comment, I think you might just have a different interpretation of the question :)

MeshCollider

Apr 16, 2018 22:48

@Murch yeah this is a nice solution

MeshCollider

Feb 13, 2018 02:20

@pazee hi there! Are you affiliated with coingecko in any way? A lot of your recent answers include a link to that site, if you are then please include a disclaimer (see bitcoin.stackexchange.com/help/promotion)

MeshCollider

Jan 17, 2018 22:14

Thank you for helping out though!

MeshCollider

Jan 17, 2018 22:14

In this case, please redirect all unconfirmed transaction questions to the canonical one here: bitcoin.stackexchange.com/questions/9046/…

MeshCollider

Jan 17, 2018 22:13

@Henry if you have to post an identical answer for multiple questions, chances are they should just be closed as duplicates instead :)

MeshCollider

Jan 17, 2018 22:12

\o/

MeshCollider

Jan 17, 2018 04:36

kill the tag!

MeshCollider

Jan 17, 2018 04:33

@Murch a coin is a unit of value in a cryptocurrency, surely you know that ;)

MeshCollider

Jan 15, 2018 20:13

I've never seen anyone actually have a meeting at least lol

MeshCollider

Jan 15, 2018 20:12

We haven't really done anything with it though

MeshCollider

Jan 15, 2018 20:12

@JakeSymons it was just designed to be a general chat time so that multiple people would be online at once to talk

MeshCollider

Jan 15, 2018 07:49

@fredsbend yeah just the bitcoin bucket, for $20 worth of BTC iirc

MeshCollider

Jan 14, 2018 20:35

@Murch yeah is it overkill to make a new channel just for smokedetector

MeshCollider

Dec 30, 2017 19:57

Ways they could be stolen include storing them on an online wallet which gets hacked, storing them on your PC unencrypted which gets malware on it, storing them on paper which someone physically gets access to, etc

MeshCollider

Dec 30, 2017 19:56

So keep your private keys safe :)

MeshCollider

Dec 30, 2017 19:55

@NicolasBarbulesco really the only way to have your bitcoin stolen is if someone else gets your private key somehow. If you keep your private keys safe, then only you can spend your coins (so the worst they could do is trick you to send coins somewhere e.g. phishing)

MeshCollider

Dec 27, 2017 12:00

@chytrik Yep exactly, same thing that happened with ICOs is happening with forks

MeshCollider

Dec 27, 2017 09:55

But I heard someone say futures are already trading at $500+, is that true? Its not going to end well for people if thats the case

MeshCollider

Dec 27, 2017 09:55

it cant even claim to be bitcoin, its using X11 instead of SHA, DGW instead of the current difficulty retargetting algo, massive premine, changed blocktime to 2.5 minutes, different address format, everything

MeshCollider

Dec 27, 2017 09:53

Heh yep but its getting a ridiculous media coverage because of the name

MeshCollider

Dec 26, 2017 23:25

b2x-segwit.io

MeshCollider

Dec 26, 2017 23:25

wth S2X is trying to be relaunched?

Discussion on answer by marshal craft…

Imported from a comment discussion on bitcoin.stackexchange.co...

MeshCollider

Dec 26, 2017 12:19

Amount of satoshis IS an integer, and it cannot be infinite because it is limited to 8 bytes

MeshCollider

Dec 26, 2017 12:14

Satoshis are exactly defined as 1*10^-8 BTC, there is no ambiguity or room for arbitrary definition

MeshCollider

Dec 26, 2017 12:13

@marshalcraft Floating point numbers do not form a group, for example their addition is not associative. So what are you talking about group homomorphisms for? Group homomorphism to what group?

MeshCollider

Dec 26, 2017 12:11

It is misleading and not useful for you to tell the asker that bitcoin uses floating point numbers when that is blatantly not true, they will just be misinformed later. Please stick to facts

MeshCollider

Dec 26, 2017 12:11

> Sending a lesser informed person on a foot chase into just what a satoshi is, is missleading and not useful.

MeshCollider

Dec 26, 2017 12:10

The amount of satoshis is what is included in the raw transaction which is hashed, and indeed, SHA256 is secure as far as we know, but the collision resistance of SHA256 is nothing to do with what units are used for the amounts in the transaction being hashed

MeshCollider

Dec 26, 2017 12:07

Secondly, the hash of a transaction is unrelated to the verification of wallet balance, the merkle tree just proves the transaction is inside that block

MeshCollider

Dec 26, 2017 12:06

that is why satoshis are used, and there is only 10^-8 precision, not "millionth decimal place" as you said in your answer