Topic: NXT :: descendant of Bitcoin - Updated Information - page 670. (Read 2761642 times)

Opportunity

Can someone develop an Nxt equivalent of Proof of Existence so that NMAC (and other Virtual Corporations) can register itself like this company did on the Bitcoin blockchain? This well written prospectus can also be registered and published using the same method, making it official and "legal”. It gives a greater sense of legitimacy and serves as a show case of how the Nxt ecosystem can provide similar or better safeguards for investors normally enforced through government or centralized means.

Call it what you like - the problem is what are the implications if a forger "hides their blocks" in order to track and create a better fork and what should TF do in order to minimise the risk of damage.

I am not certain where we are heading. We are talking about the selfish-mining attack?

Boooo.

I like your approach.

What definition of security do you apply? Just to get sure we are talking about the same thing.

Great!

So here I've gone back to the 1st simulation configuration but now added a new "combined best streak" which combines all the accounts apart from the last one:

blocks = 1440
a: 10
b: 10
c: 10
d: 10
e: 10
f: 50
ebfcefffcefffcafffcfedafffcfbaacaaaffffffeabafdfcdfffeffcfcfffaffdfbaffbeafeafe fbfdfbffbfdaffdcafceffcbafeffadafffafedffaccdecfabafe
fefcbafafcfeffffdadcfbffbbafbfaeeffbffbefacffafeddfbafeafdfbfebfefcfffebfcadffc ffffafeafbebbefffabcfeffefbdfefcadaafedbfffafafcffeff
dfecfafbdfbfcfbdfffffdfffadbfffbfbafffedadaebafffafbfffafccaefbcabfcaffaffffcff fdfffffaafcfbfcfdcafcfaefcedcfffbfffcfafdcddaacfacdde
fafabffccfeffafdbfdfcbfaccffebcefefffeadacfbecedfdbbffeccbbfacbefffbffffffefcff fffdaffcebffbbfdcbefafffecfffaffaffffffbffedfdcffbfaf
fffbfffffebdadeffffaffbbfcfdfcffaaffffcaffeffeefffaffcecfcffdfffffbfaffffdbdaff eccfffffbfefeadffffeedefcffcdbfbfffefffafadffddbdfcef
cbbddccbffbffcceaadfbcffffdfebeaebfedeffcfbfaddcbaabccfffffaadfffffadeffffdcffffaccfffcbfdbffffcddaeeafdebfcfffcdcddffeafafbeffbfffa
fffaffcbfcffefcaafeafffffcebafadbffefebfdfcffefffcfefcfdfafeffbbfaffbfdffafffda cffcfffcfcfbfcbfdeafffaddeffcdfbeffeceaebbfffafdfabff
adffcfdfdaffadbfcffbdcffaffbfdcaaaffefddfffffdfdbefaefcffecfaeecdcddcfedbfcbfdf dfffeafcdffeebfafffbbfacbcfffbbfefffdbfeffafffbfbaffa
ffbffbfbfffaaecdfbfcffffbfcfffbfcafeefdffdfbfafdffceffffdffafdffdfdbffbbfbfaafe edffdfffffaaecdfffffcdfbfbcdcafeeacfeffffefffffdddfdc
cfebfffbfeecdcffcfaaabbbdfbfcbbedfdfbddfffffbfddaffefedfdeffffefbcfecfcefdbfafa efafddabffbeedadffffafffffffcbdbbcffeabadcbefdffbecaf
ffdfdafcfdfbfcffdebdffabffbdaaefefffffdefacdefacfffcafecefabfdcfbffdffefeffffbb ecaaabbffffdbfeefefcbfffafffbfccfcacbffef
wins( a ) = 165
wins( b ) = 156
wins( c ) = 150
wins( d ) = 147
wins( e ) = 146
wins( f ) = 676
best_streak( a ) = 3
best_streak( b ) = 3
best_streak( c ) = 2
best_streak( d ) = 3
best_streak( e ) = 2
best_streak( f ) = 7
best_combined_streak = 10

I've again "bolded" the longest streak which now happens to be our combined one (that hurt my eyes to find).

Running it a few times shows that sometimes the best combined streak is better and at other times worse so I'd say on average it's going to be the same (i.e. "splitting up accounts in to smaller accounts" won't help).

Hei Rick,

I can do some quick changes, so the flyer will look a little bit more....modern and clean (speaking of using only one font, not so many colours, etc.).
Did you use Indesign, QuarkX or something else?

Feel free to send me a downloadlink of the raw data via PM.

w4llace

Download this: http://blog.nfllab.com/archives/152-Win32-native-md5sum,-sha1sum,-sha256sum-etc..html

Good idea.

And I have start a new thread to list and talk about the Nxt Apps,such as Nxtty,iNxt,and so on.
https://bitcointalk.org/index.php?topic=488417.new#new

Good - as security of the network and blockchain are the "most important things" (I think we can all agree that if either the network or blockchain are damaged badly it would not bode well for Nxt).

+1

Fair was not a good expression, I admit. Let's just discuss this stuff with security of the network in mind.

+1

Please get in a touch with a designer, QBTC or another one!

We need to also model the possibility of getting an effective "winning streak" by having multiple smaller accounts to know whether or not the situation changes (I am not sure yet so once again will need to "see it through simulation").

Interesting, Ian.

Quick thought: A forging account forges block(n=1). Now he will automatically won't be able forging block(n=2...60). This wouldn't help with the problem because he could game the system by splitting his account to a much higher number of accounts so he has the same P to work secretly on a new chain with his 'pool'. Right?

The figures skew as the larger stake holder gets bigger due to the way the math is done (you can see when I publish it) but in any case if anything it might be showing slightly "better" results that the reality (certainly not worse).

If you have only 2 people A and B forging and A has 1 nxt and B has k nxt then P(A forges a block)=1/(2k) and thus P(B forges a block)=1-1/(2k).
Plugging in your numbers (in your example you can devide both accounts by 10 giving A 1 nxt and B 9 nxt) you get:
P(A forges a block) = 5.5%, P(B forges a block)=94.5%.

There must be something wrong in your simulation.

I'm leaving out a slight detail about the "math" which is relevant to the numbers becoming more skewed as the largest stake holder has a higher % (will get to that later).


I am actually mulling over a few ideas at the moment and also which to discuss this with CfB and indirectly with BCNext so let's not rush into that for now.

I think we should not implement where people are able give their stakes (mining power) to pools.. That will  defeat the concept behind proof of stake.