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Author Topic: NXT stake-grinding attack?  (Read 5234 times)

coretechs

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NXT stake-grinding attack?
February 26, 2015, 02:33:09 am

https://download.wpsoftware.net/bitcoin/alts.pdf

Quote
In its initial incarnation, NXT was susceptible to a trivial stake-grinding attack (to be described below) and could not achieve any consensus. Since becoming closed-source while spamming technically-illiterate claims at popular conferences, it has fallen out of scope of this document

Does anyone know more about the stake-grinding attack referenced here?  Does the "initial incarnation" refer to something that happened right after NXT was launched?
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jones

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Re: NXT stake-grinding attack?
February 26, 2015, 02:47:17 am

https://download.wpsoftware.net/bitcoin/alts.pdf

Quote
In its initial incarnation, NXT was susceptible to a trivial stake-grinding attack (to be described below) and could not achieve any consensus. Since becoming closed-source while spamming technically-illiterate claims at popular conferences, it has fallen out of scope of this document

Does anyone know more about the stake-grinding attack referenced here?  Does the "initial incarnation" refer to something that happened right after NXT was launched?

Edit:
"Because NXT is a new and scary technology that I don't feel like learning more about to make this document I'm going to say it has the same vulnerability that other earlier PoS systems had to get rid of it"

Stake grinding was a technique based around PoS currencies which used coin age, which nxt never was. BCnext originally was going to use coin age, but was dissuaded to do so by cunicula if I remember my history correctly.

Bitcoiners are scared :)
-- Jones NXT-RJU8-JSNR-H9J4-2KWKY

Tosch110

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Re: NXT stake-grinding attack?
February 26, 2015, 02:57:49 am

Stake grinding was a technique based around PoS currencies which used coin age, which nxt never was. BCnext originally was going to use coin age, but was dissuaded to do so by cunicula if I remember my history correctly.

I have something familiar in mind.

Bitcoiners are scared :)

Quote from: Douglas Crockford
Weaving the Threads
- The people who should be first to recognize the value of innovation are often the last
- Obsolete technologies fade away slowly

coretechs

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Re: NXT stake-grinding attack?
February 26, 2015, 03:19:13 am

I'm surprised that he confused PPcoin with NXT, especially considering how recently the paper is dated.
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jl777

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Re: NXT stake-grinding attack?
February 26, 2015, 03:31:14 am

I'm surprised that he confused PPcoin with NXT, especially considering how recently the paper is dated.
both have three letters "PPC" and "NXT" and it is easy to get them mixed up
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achim

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Re: NXT stake-grinding attack?
February 26, 2015, 08:26:25 am

Quote
could not achieve any consensus.

This is the part I love the most  :)

In the old days we used to post block height and ids daily to check if we were on a fork.
The network may have been fragmented a little bit during the zombie node attacks and such, but consensus was always reached sooner or later.

coud not achieve any consensus... lol
« Last Edit: February 26, 2015, 11:01:13 am by achim »

Come-from-Beyond

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Re: NXT stake-grinding attack?
February 26, 2015, 10:58:29 am

https://download.wpsoftware.net/bitcoin/alts.pdf

Quote
In its initial incarnation, NXT was susceptible to a trivial stake-grinding attack (to be described below) and could not achieve any consensus. Since becoming closed-source while spamming technically-illiterate claims at popular conferences, it has fallen out of scope of this document

Does anyone know more about the stake-grinding attack referenced here?  Does the "initial incarnation" refer to something that happened right after NXT was launched?

The author of that "whitepaper" is a bitcoiner. It explains all.

youyou

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Re: NXT stake-grinding attack?
February 26, 2015, 11:11:33 am

Quote
Since becoming closed-source while spamming technically-
illiterate claims at popular conferences, it has fallen out of scope of this document.

 ???

valarmg

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Re: NXT stake-grinding attack?
February 26, 2015, 11:32:45 am

I'm surprised that he confused PPcoin with NXT, especially considering how recently the paper is dated.

Seems that quote is copy-pasted from his pos.pdf from back in April/May.

Anyway, having that quote in the document indicates that much of the "treatise" is likely to be unresearched and wrong. Saves having to waste time reading it.
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msin

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Re: NXT stake-grinding attack?
February 26, 2015, 01:46:31 pm

If I were to write a paper on Bitcoiner authors, I would describe this guy as an "incredible dumbass"

Tosch110

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Re: NXT stake-grinding attack?
February 26, 2015, 01:52:53 pm

If I were to write a paper on Bitcoiner authors, I would describe this guy as an "incredible dumbass"

but he knows scientific paper format... has to be legit.

coretechs

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Re: NXT stake-grinding attack?
February 26, 2015, 03:32:32 pm

Seems that quote is copy-pasted from his pos.pdf from back in April/May.

Anyway, having that quote in the document indicates that much of the "treatise" is likely to be unresearched and wrong. Saves having to waste time reading it.

Actually the first half of the paper isn't bad, it does a pretty good job explaining bitcoin / pow consensus.  It would have been nice to read a criticism of NXT if the author had the same level of understanding about it.
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Daedelus

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Re: NXT stake-grinding attack?
March 01, 2015, 02:09:07 pm

If I were to write a paper on Bitcoiner authors, I would describe this guy as an "incredible dumbass"

but he knows scientific paper format... has to be legit.

Yup, and it's a PDF. So I can't see how it can't be anything other than 100% watertight.
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kushti

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Re: NXT stake-grinding attack?
March 19, 2015, 09:51:46 am

The quality of the treatise is just horrible. And it seems Andrew hasn't an idea about a "consensus"(can't get totally which kind of consensus he has assumed) & why proof-of-work was proposed for anonymous Byzantine Agreement (see intro https://eprint.iacr.org/2014/765.pdf for details)
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kushti

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Daedelus

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Re: NXT stake-grinding attack?
March 21, 2015, 09:27:55 am

I saw. Feels to me you are calling his bluff, far too many excuses for not doing a full analysis were given in those few paragraphs..  :D I don't know how you can make these kind of claims without academic rigor.
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Come-from-Beyond

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Re: NXT stake-grinding attack?
March 21, 2015, 10:09:00 am

I don't know how you can make these kind of claims without academic rigor.

Easily. Science of decentralized consensus doesn't have established paradigms yet.

kushti

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Re: NXT stake-grinding attack?
March 21, 2015, 06:58:25 pm

I don't know how you can make these kind of claims without academic rigor.

Easily. Science of decentralized consensus doesn't have established paradigms yet.


Disagree, it's around for ~50 years or maybe even more. Internet of today wouldn't be possible without a bunch of fault- and byzantine-tolerant algos. The innovation around blockchain is sybil-resistent solution to anonymous Byzantine agreement for building decentralized append log(a.k.a. versioned database a.k.a. blockchain).
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Come-from-Beyond

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Re: NXT stake-grinding attack?
March 21, 2015, 07:44:24 pm

Disagree, it's around for ~50 years or maybe even more. Internet of today wouldn't be possible without a bunch of fault- and byzantine-tolerant algos.

Haha, it's cool that you mentioned byzantine-tolerant algos. I claim that Satoshi has not solved byzantine generals problem. Do you agree or not? If not, I'd like to hear your reasoning.

kushti

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Re: NXT stake-grinding attack?
March 22, 2015, 03:25:18 am

Haha, it's cool that you mentioned byzantine-tolerant algos. I claim that Satoshi has not solved byzantine generals problem. Do you agree or not? If not, I'd like to hear your reasoning.

Again, here's the outstanding paper on that https://eprint.iacr.org/2014/765.pdf
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