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Topic: delete - page 63. (Read 165521 times)

newbie
Activity: 42
Merit: 0
October 01, 2014, 05:50:24 AM

math


Hopefully you're feeling better if you're back on here. Smiley

Any thoughts on BCX's claim that an attack is in progress and might take up to 22 days to materialize?

The math shows no such evidence has been presented thus far in this thread. That doesn't mean something isn't occurring though.

I don't know about my health because haven't done the blood tests, xrays, and head scan yet. Maybe next week. All I can say for now is that with my current condition, I can't work a lot on the computer as it makes me very ill. Getting off the computer and out in the sunshine for days reduces the ill feelings. And concur upthread on the suggestions about natural diet.
legendary
Activity: 826
Merit: 1000
amarha
October 01, 2014, 05:39:54 AM

math


Hopefully you're feeling better if you're back on here. Smiley

Any thoughts on BCX's claim that an attack is in progress and might take up to 22 days to materialize?
newbie
Activity: 42
Merit: 0
October 01, 2014, 05:21:25 AM
...

At some point I am sure the XMR team will realize they do indeed need my help and we may work something out.

But anyway the image below posted by nutildah is interesting. Check the blocks just prior to the circle.

Later guys.


~BCX~




another 4 blocks in the last minute.

By my math, with 1 block per minute mean rate, one should see 4 blocks in the same minute about once every hour or so.  Is this correct?

I see 12 blocks in 4 minutes.

We apply the Poisson distribution.

The probability that we will get 4 blocks in 4 minutes when the expected rate is 1 block per minute (4 blocks per 4 minutes) is:

p = 44 / 4!e4 ≈ 19.5%, i.e. an occurrence expected roughly every 5 minutes.

The probability that we will get 12 blocks in 4 minutes when the expected rate is 1 block per minute (4 blocks per 4 minutes) is:

p = 412 / 12!e4 ≈ 0.064%, i.e. an occurrence expected roughly every 1559 minutes which is every 26 hours.

And note that the probably we get 10 - 14 blocks in 4 minutes is going to several times higher because we sum the probabilities for each of 10, 11, 12, 13, and 14, thus an occurrence expected several times per day.
newbie
Activity: 42
Merit: 0
October 01, 2014, 05:18:55 AM
Size of the solution space isn't the right word. I mean the function of the size changes from exponential (nkO(2n)) to polynomial (nO(1)O(nk)).

If it is possible to convert the computation time (resource cost) from an exponential function of to a polynomial function of the inputs of the algorithm, then the complexity has been reduced from NP to P.

I cited a link which I believe demonstrated this, although I may be mistaken.

The search space for brute force inversion of SHA256 is 2bits, e.g. a 128-bit hash has 2128 possible outputs. All known methods for inverting SHA256 are NP relative to bits, and often cryptanalysis attacks remain in NP and only reduce the exponent by a factor that makes them practical solve for certain n. For example for finding collisions, the birthday attack is 2bits/2. However, some attacks may reduce the complexity to P, e.g. a quantum computer (Shor's algorithm) on RSA reduces integer factorization from sub-exponential to polynomial.

NP requires that the solution can be verified in polynomial time. For example, the verification that the input to a hash produces a certain output.

Please feel free to correct me if I am still wrong.

It is not an error of fact, but only the use of a theory that is not really relevant to the problem.

All you wrote is correct, but, as you note, NP and P (and the O() notation) are meaningful only if the number of bits n is considered variable, and they describe how the cost grows ultimately as n goes to infinity (informally, "just before n reaches infinity").  The theory has nothing to say if one considers a specific n (say, 256), or any n less than some fixed bound, (say, n up to 1 million bits).  In that case, the complexity classes cannot be distinguished: every function with a finite domain can be computed in polynomial time, indeed in O(1) operations.  This is a trivial observation that follows directly from the definitions.

The definition of polynomial time is precisely the time complexity class O(nk).

The relevance is that for NP complexity class, very small increases in n causes exponential (not polynomial) increases in computation cost.

If the best known inversions of SHA256 are NP, then NP is relevant because it means there is some smallish value of n for which no inversion is practical. Afaics, this is what complexity theory gains us.

It is unfortunate that complexity theorists still teach computer science students that their theory has practical relevance, to the point of using the word "efficient" as synonym of "polynomial time".  In fact, that theory is as relevant to software development as the Banach-Tarsky paradox is to manufacturing.

Sir, in year 2000 I paid $30,000 for a week of work to Jeff Stock a former lead developer of Borland C to code the Objects Window in my Cool Page product. He had tested it with a few objects. I loaded it up with 1000 objects and it slowed to molasses. I asked him to fix the problem. After a few days he hadn't fixed it, so I took an hour to study his code and changed one line which reduced the time complexity from O(nk) to O(log n).

Afaics, time complexity is relevant to computer science practice in the real world.
legendary
Activity: 2492
Merit: 1473
LEALANA Bitcoin Grim Reaper
October 01, 2014, 04:51:04 AM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes..  

True. But an attack on price was not what BCX said he was going to accomplish. It was in reference to the XMR protocol and its network security.

Thus far it appears the attack is only talk.

I'd like to be proven wrong or right...whichever but nevertheless end this pointless charade of ego inflating.  Grin Grin Grin

tough call man.. i believe when BCX said that but hey.. it's all business right ?
ya never know though there still may be a remote possibility he was trying to "sway" the market price.. what do i know ? hahah
don't matter to me either way.. i don't care about XMR's price LOL

You don't care yet you sure have a lot to say.
member
Activity: 87
Merit: 10
October 01, 2014, 12:20:36 AM
Pardon me, I'm new around here... But my fresh perspective is that spoutnik comes across as rather hurt in the butt. In fact I can sense his ring burn from the other side of the world.
hero member
Activity: 854
Merit: 500
September 30, 2014, 11:36:38 PM
Don't you realize that each time you make a parallel between moderated topic and NAZIS your credibility goes abysmally negative? Rptiela made like one...maybe two self-moderated topic which are filled with negative comment as far as I can read, yet he kicks a few obvious/obnoxious dedicated trolls and here you are screaming everywhere NAZIS NAZIS NAZIS XMR HITLER like a beheaded duck. That's beyond ridicule.
Do you even know what Nazis were? What they did? Come on.






read.......






Quote
The rules of this thread are very strict, as always in my threads:

- There is no freedom of speech. The topic is altcoins, but I also want that it stays in a level that is possible and interesting to read for a busy Bitcoin holder that does not care about alts. I know how it feels to be a busy Bitcoin holder, so I steer the discussion to the maximum benefit for me, and for my readers.

- Which alts can be discussed, is up to me. Mentioning an alt after that specific alt has been banned from a thread results in a ban for you. If you do not obey my ban from the thread, historically you have had 100% chance to be banned from the forum as a result. Don't try your luck.

- Posts may be deleted for whatever reason. Deletion does not necessarily mean that the post was offensive. It may also have been too long quote (in which case either the original, or the reply may be pruned), repetition of yours or somebody else's point, or anything else.

- Moderating actions are written in red. Others are not allowed to use red.
Don't you realize that each time you make a parallel between moderated topic and NAZIS your credibility goes abysmally negative? Rptiela made like one...maybe two self-moderated topic which are filled with negative comment as far as I can read, yet he kicks a few obvious/obnoxious dedicated trolls and here you are screaming everywhere NAZIS NAZIS NAZIS XMR HITLER like a beheaded duck. That's beyond ridicule.
Do you even know what Nazis were? What they did? Come on.






read.......






Quote
The rules of this thread are very strict, as always in my threads:

- There is no freedom of speech. The topic is altcoins, but I also want that it stays in a level that is possible and interesting to read for a busy Bitcoin holder that does not care about alts. I know how it feels to be a busy Bitcoin holder, so I steer the discussion to the maximum benefit for me, and for my readers.

- Which alts can be discussed, is up to me. Mentioning an alt after that specific alt has been banned from a thread results in a ban for you. If you do not obey my ban from the thread, historically you have had 100% chance to be banned from the forum as a result. Don't try your luck.

- Posts may be deleted for whatever reason. Deletion does not necessarily mean that the post was offensive. It may also have been too long quote (in which case either the original, or the reply may be pruned), repetition of yours or somebody else's point, or anything else.

- Moderating actions are written in red. Others are not allowed to use red.

Spoetnik is maybe the guy who made it on the top 10 idiot list for Twitch.tv chat: http://www.youtube.com/watch?v=Vfdky8Nmlic

Quote
h i only get one message in slow mode huh? well, if i only get one message, i'll make it sweet and sharp. These authoritarian mods will not be tolerated. Hearthstone was based on the premise of the free market, and it has been corrupted by N A Z I mods in chat who are power hungry. Don't ruin the Hearthstone and twitch chat experience. Thanks

That sounds exactly like something you would say
legendary
Activity: 1204
Merit: 1002
Gresham's Lawyer
September 30, 2014, 11:18:07 PM
i don't care so much who posts what here as WHAT itself is posted.

This may be an imperfect strategy. 
In communications, considering also the source and context may provide information beyond just the text posted.

rpietila has admitted to being and altcoin noob, (even though you don't believe that) so we might expect that he is likely not accustomed to the Alt section of the forum, in the same way that you are.
So it is understandable for me, your reaction to his posts.  Also understandable to me, is his perspective.
Text, and also the source and context may matter.

In every disagreement there is an opportunity to learn, both about the world, and about ourselves.
This is what makes the fight worth the bruises.
legendary
Activity: 1624
Merit: 1008
September 30, 2014, 10:47:46 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes..  

True. But an attack on price was not what BCX said he was going to accomplish. It was in reference to the XMR protocol and its network security.

Thus far it appears the attack is only talk.

I'd like to be proven wrong or right...whichever but nevertheless end this pointless charade of ego inflating.  Grin Grin Grin

tough call man.. i believe when BCX said that but hey.. it's all business right ?
ya never know though there still may be a remote possibility he was trying to "sway" the market price.. what do i know ? hahah
don't matter to me either way.. i don't care about XMR's price LOL

I am quoting you only because of your avatar.  The following is obviously speculation but I remember the past the same as the poster. 

Interesting point: BCX claimed that Cryptsy didnt add XMR back in July because they asked him for an expert opinion and he advised them of potential exploits that put them off. Does this recent change from Cryptsy mean that their "expert" has now told them that XMR is safe, or does it mean they no longer believe their "expert"?

hero member
Activity: 532
Merit: 500
September 30, 2014, 10:45:37 PM
For those wishing to have smart conversations, I remind you the existence of a Monero self-moderated general thread (on top of all the others, like the equally self-moderated MEW thread.


When will Monero Labs start offering advanced classes in market manipulation, cult-like community building, and strategic pump and dumps?  I'd like to register  be an instructor.  : )

FTFY

Why did you need to fix it for me?
legendary
Activity: 1638
Merit: 1001
September 30, 2014, 10:42:50 PM
For those wishing to have smart conversations, I remind you the existence of a Monero self-moderated general thread (on top of all the others, like the equally self-moderated MEW thread.


When will Monero Labs start offering advanced classes in market manipulation, cult-like community building, and strategic pump and dumps?  I'd like to register  be an instructor.  : )

FTFY
hero member
Activity: 532
Merit: 500
September 30, 2014, 10:34:24 PM
For those wishing to have smart conversations, I remind you the existence of a Monero self-moderated general thread (on top of all the others, like the equally self-moderated MEW thread.


When will Monero Labs start offering advanced classes in market manipulation, cult-like community building, and strategic pump and dumps?  I'd like to register.  : )
legendary
Activity: 1540
Merit: 1011
FUD Philanthropist™
September 30, 2014, 10:20:46 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes..  

True. But an attack on price was not what BCX said he was going to accomplish. It was in reference to the XMR protocol and its network security.

Thus far it appears the attack is only talk.

I'd like to be proven wrong or right...whichever but nevertheless end this pointless charade of ego inflating.  Grin Grin Grin

tough call man.. i believe when BCX said that but hey.. it's all business right ?
ya never know though there still may be a remote possibility he was trying to "sway" the market price.. what do i know ? hahah
don't matter to me either way.. i don't care about XMR's price LOL
legendary
Activity: 1540
Merit: 1011
FUD Philanthropist™
September 30, 2014, 10:16:11 PM
As for moderated vs. unmoderated threads, the main issue is S/N-ratio. It's possible to buy sockpuppet work for $0.12-$0.20 per message. Just to take an example, NewLiberty posts here and the opportunity cost for him to write these messages is certainly about $100. It is possible to inundate his reasonable and insightful messages below a pile of junk at a price much cheaper than it is for him to write them. This is an economic attack which wears down the good posters so that in the end only the junk remains.

(self)Moderation is a way to mitigate it. If you feel your contribution is not welcome, you can refrain from posting into such threads and do not lose anything. NewLiberty's readers gain by not needing to wade through the pile of junk when they are interested mainly in NewLiberty's contribution and the insightful responses to it.

I suggest you open your own private forum for you and your supporters to enjoy "insightful" discussions free from this "pile of junk" (as you call it) all the users with differing opinions post here. This way you can enjoy "clean" discussions with your supporters and fans while giving this place relief of the Monero invasion at the same time. It would also cause you less work as you wouldn't have to delete/censor half of the posts in your threads. How about that? Your current approach basically screams for the trolls to come and troll against "the great self-proclaimed teacher" imho.

smart point i see what your getting at.

i don't care so much who posts what here as WHAT itself is posted.
i will agree or disagree with anyone whether i like them or not.. i come here to discuss altcoins not use this as a hang out.
and many of us just go with it..
some of see each other talk and we don't necessarily agree with everything each other says..
for example, there has been the odd thing say BitcoinExpress or Kelsey has said i don't fully agree with but it's 100% perfectly fine..
we come here to share ides and to hash out some discussions about coins.. derailing things into personal matters is pointless bullshit.

i respect people that can handle a conversation not the ones who like me.. i don't care who likes me and that works both ways of course.
we don't have to agree and we don't have to get along but we need to try and ease up on the back stabbing and trolling and lying to defend bag holding coins.
see what i said in response here to the guys point ?
i don't think people get what i say most of the time they have a very superficial fleeting understanding of what is going on.
my response here relates to what was said.. i am staying ON-TOPIC lol

i say stuff as walls of text so i can be specific and not vague in case people are curious?
and i thank the guy earlier who said something in my defence..
thank you for trying to get the underlying message in my comments (not the tone or reading in between the lines)
all i see is this stuff as way of sharing your opinions.

and i always encourage others to share theirs and please do be passionate about it.. let's hear it.. speak up and take part in things Smiley
legendary
Activity: 1638
Merit: 1001
September 30, 2014, 09:59:22 PM
Is there a possibility that BCX might have sold his account and the new owner was just doing this to create a nice opportunity to short XMR?

It's possible.

It's also possible BitcoinExpelled looked into his future, saw 40 years of hangovers and masturbating, and slurred out, "I'll show the bastards", and tried to implement code he knows nothing about.

legendary
Activity: 1204
Merit: 1002
Gresham's Lawyer
September 30, 2014, 08:30:16 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes..  

Check this: http://chainradar.com/xmr/blocks

Looking fine

BCX has been pretty clear in that BCX doesn't care about the price or money.
Change in price is irrelevant, that is just the fear, or whatever.
So far no evidence of an attack other than a DDoS or two, and BCX does not claim that as part of any attack that I know of.
legendary
Activity: 2492
Merit: 1473
LEALANA Bitcoin Grim Reaper
September 30, 2014, 07:53:18 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes.. 

True. But an attack on price was not what BCX said he was going to accomplish. It was in reference to the XMR protocol and its network security.

Thus far it appears the attack is only talk.

I'd like to be proven wrong or right...whichever but nevertheless end this pointless charade of ego inflating.  Grin Grin Grin
legendary
Activity: 2268
Merit: 1141
September 30, 2014, 07:18:10 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes.. 

Check this: http://chainradar.com/xmr/blocks

Looking fine
legendary
Activity: 3010
Merit: 8114
September 30, 2014, 07:08:33 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy

Almost 10 days, XMR is down 14% since then, so, I would say the attack was only minimally successful. I think BCX has the ability to disrupt the blockchain but only for minutes at a time.

Speaking of that, there hasn't been a new Monero block in 20 minutes.. 
legendary
Activity: 2492
Merit: 1473
LEALANA Bitcoin Grim Reaper
September 30, 2014, 06:48:28 PM
What attack day # are we on now? Like 8? 9? 10?

 Cheesy
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