Author

Topic: [ANN][DASH] Dash (dash.org) | First Self-Funding Self-Governing Crypto Currency - page 5048. (Read 9723858 times)

hero member
Activity: 700
Merit: 500
I guess the point is that theoretically PoW could be attacked, but it would be vastly less expensive to attack PoS. In fact, the greater the attacker's credibility, the cheaper the attack would be.

Slight issue. With POS (at least in an implementation such as NXT), by the time you bought up enough of the coin supply to "attack" the network catastrophically, the only holder affected significantly by such an attack would be yourself  Embarrassed

Put another way, it would be like buying somebody's house off them so you could burgle it Smiley

But again, the interesting thing is that you can buy up 51% of a PoS coin, and then sell off your coins so that you no longer have 51%, but your history of having once owned 51% makes it possible to attack the network at any time, for free.

So if there is ever a PoS coin with >51% ownership at any point in its history (even in just the Genesis block) then it is vulnerable.
legendary
Activity: 1708
Merit: 1049
So how did he 'acquire' the coins? Sure, PoS security includes distribution, but to say thats no risk, no cost attack is just false?

In the nothing-at-stake vector

You buy / mine  (depending the initial distribution) => you sell (at this point you are even) => you keep the "snapshot" of when you had the coins => you now begin an attack on the network with zero coins and nothing to lose.
legendary
Activity: 3066
Merit: 1188
I guess the point is that theoretically PoW could be attacked, but it would be vastly less expensive to attack PoS. In fact, the greater the attacker's credibility, the cheaper the attack would be.

Slight issue. With POS (at least in an implementation such as NXT), by the time you bought up enough of the coin supply to "attack" the network catastrophically, the only holder affected significantly by such an attack would be yourself  Embarrassed

Put another way, it would be like buying somebody's house off them so you could burgle it Smiley
legendary
Activity: 1120
Merit: 1000
Incorrect. In PoW, the network is secured by hardware, so the owner of a majority of coins is irrelevant. To anticipate your argument: yes, if one person decides to buy the majority of coins and attempts to destroy them by "dumping" that will drive the price down and reduce the economic incentives to mine. EXCEPT, that as fewer people mine, difficulty adjusts and mining becomes less expensive relative to rewards. Not only that, but as that paper points out, the cost of operating mining rigs is marginal (especially with difficulty adjustments).
No I didn't mean it like that. In POW you can buy half of the hash network and have the same argument of "no cost" 51% attack if you don't count money as cost. And thats absurd.

That's true, but buying that much hashpower would require a non-trivial investment. Not only that, but it would be very difficult, if not impossible, to acquire that much hardware due to manufacturing time and relatively small product pipelines. Such an accumulation of hashpower would have to happen in secret, which is also unlikely, because if it became known, the network could easily embrace a hardfork to change the PoW algo.

I guess the point is that theoretically PoW could be attacked, but it would be vastly less expensive to attack PoS. In fact, the greater the attacker's credibility, the cheaper the attack would be.
legendary
Activity: 1176
Merit: 1036
Dash Developer
hi - my pool (https://www2.coinmine.pl/drk/) has updated wallet and paid few blocks for masternodes but last 3 blocks were not paid - anyone knows why is that?

Jump on #darkcoin-test and I'll help you
legendary
Activity: 1708
Merit: 1049
This is Veri's growth chart. Looks great to me. Over 500 btc buys this morning, if it carries on like this, it could go parabolic like DRK.

Just don't forget to get out in the right time, however great the pump is - it's still PoS coin...
Whats the problem with pos coins ?

http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2393940

So to summarize, if a credible attacker announces his/her intention to destroy a POS currency, holders of that currency are likely to sell to the attacker very cheaply due to their belief that the attack will be successful and thus their coins will be worth nothing if they sell them. Very interesting point. In fact, it presents a "prisoner's dilemma" of sorts, where an attacker can be thwarted if the majority is able to resist the pressure, but where it's in the interests of an individual to break consensus and deal with the attacker.

Yes, but there are still other vectors which do not really require selling. You can use prior owned coins to attack the blockchain. You can counterfeit the chain with a chain where you HAD the majority stake at some point of time - but you no longer need that majority to launch a nothing at stake attack - where you risk absolutely zero effort / money (you've already sold your coins in the past).

https://bitcointalksearch.org/topic/m.6753716

The attack has no cost or risk.  

Very simplified example:
The network stake is 2M xCoins.
I acquired 1.1M xCoins as of block 1,000.
I sell you 1.1 M xCoins for $$$$$$$ and the transfer is recorded in block 1,001.
I now no longer have any xCoins (effective block 1,001+), I have no cost as I received $$$$$$ in return for the 1.1M xCoins.
I start building an attack chain as of block 1,000 double spending my transfer.

Eventually even if the main chain has a head start, my attack chain will be longer.  This is no different than a 51% attack on a PoW based network however my attack has no cost and no risk.   I already sold the coins.  I am merely using my history of prior ownership to attack the network.

Compare that to PoW.  I build a hashing farm with 51% of network capacity.  If I attack with it then the attack has cost and risk.  The farm wasn't free, I may not succeed in which case I would lose all the legit blocks I could build.   If I sell the hashing farm I can't engage in an attack based on the history that at one point in the past I had more hashing power than the rest of the network.

Both are vulnerable to a 51% attack however PoS allows the attacker to exploit the history (your security mechanism is recorded in the very thing you are attempting to secure) to attack without cost or risk.
legendary
Activity: 1120
Merit: 1000

So to summarize, if a credible attacker announces his/her intention to destroy a POS currency, holders of that currency are likely to sell to the attacker very cheaply due to their belief that the attack will be successful and thus their coins will be worth nothing if they sell them. Very interesting point. In fact, it presents a "prisoner's dilemma" of sorts, where an attacker can be thwarted if the majority is able to resist the pressure, but where it's in the interests of an individual to break consensus and deal with the attacker.
6 pages and this is the argument:

"Then, there are two equilibria for our game. In the first one, when U > r(N + 1)/β, agent
0 buys strictly more than half of the coins and actually kills the CC. Since this is anticipated
by all the other agents, the latter are in competition to sell to agent 0 their coins, who they
know have already no value. The attack can be undertaken at no cost."

and its bad.
It doesn't count fiat as cost and equates 'known value' with price. Beyond that, it can be easily used for POW coins as well as it doesn't really matter what you are buying, hashpower or coins.






Incorrect. In PoW, the network is secured by hardware, so the owner of a majority of coins is irrelevant. To anticipate your argument: yes, if one person decides to buy the majority of coins and attempts to destroy them by "dumping" that will drive the price down and reduce the economic incentives to mine. EXCEPT, that as fewer people mine, difficulty adjusts and mining becomes less expensive relative to rewards. Not only that, but as that paper points out, the cost of operating mining rigs is marginal (especially with difficulty adjustments).
hero member
Activity: 742
Merit: 501
hi - my pool (https://www2.coinmine.pl/drk/) has updated wallet and paid few blocks for masternodes but last 3 blocks were not paid - anyone knows why is that?

Block Heights? Please post debug log on darkcointalk thread if possible too.

Edit: Looks like 92102 is coinmine.

Stratum not finding blocks, please git pull. I believe official also had same issue yesterday.



Also looks like p2pool might need some updates.

1 minute ago   06/26 11:24:49   92101 [1][2]   3707.539   5   p2pool

sr. member
Activity: 294
Merit: 250
Code:
miningpoolhub XiWbLL912tcSxjPKQUo3W1LNy94pcqDyCi : 1.001200[1][2]-

miningpoolhub updated

Code:
pool_unknown_54 	Xj8kzichkS6uf2Vw8hz78jskt7wkyHBvdo : 1.000000[1][2]-
pool_unknown_54 updated
legendary
Activity: 1372
Merit: 1005
DASH is the future of crypto payments!
2 drk MNs payments so far Wink What a nice feeling, you eat, you swim, you sleep and drk arrives Wink
sr. member
Activity: 294
Merit: 250
Code:
wafflepool	 XvrdJFSjMBQbfShACzavAgdHe2Eb2qFSvt : 1.000200[1][2]-
wafflepool updated.​​
legendary
Activity: 1120
Merit: 1000
This is Veri's growth chart. Looks great to me. Over 500 btc buys this morning, if it carries on like this, it could go parabolic like DRK.

Just don't forget to get out in the right time, however great the pump is - it's still PoS coin...
Whats the problem with pos coins ?

http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2393940

So to summarize, if a credible attacker announces his/her intention to destroy a POS currency, holders of that currency are likely to sell to the attacker very cheaply due to their belief that the attack will be successful and thus their coins will be worth nothing if they sell them. Very interesting point. In fact, it presents a "prisoner's dilemma" of sorts, where an attacker can be thwarted if the majority is able to resist the pressure, but where it's in the interests of an individual to break consensus and deal with the attacker.
legendary
Activity: 1105
Merit: 1000
I don't really mind the price going down, but I can't say I'm not surprised. I was not expecting a huge rise but not a downtrend either ^^

this is the way market manipulation occurs as when you see its going down you sell and then when you see it is rising you buy.Both ways you lose.

That is an accurate description of the behavior of market "sheep".
legendary
Activity: 1052
Merit: 1004
hi - my pool (https://www2.coinmine.pl/drk/) has updated wallet and paid few blocks for masternodes but last 3 blocks were not paid - anyone knows why is that?

Hi,

have you tried posting this question on darkcointalk?
member
Activity: 73
Merit: 10
darksend works already?

I try to send, but the client just sent it to a new local adress.

nothing to the target adress.

I use the client v0.10.11.4 Windows


Edit:

On 2. try I get this message:


DarkCoin Error:
Couldn't find a confirmed unspend output equal to 10 DRK. This shouldn't ever happen, please report to devlopers.

Looks like darksend dosent work at all...

I have more than 10 DRK in the wallet.

Edit2:

After close and open the client I can send again.

Now I have: darksent Status => Waiting for more entries (1/3), but no changes....
It needs to wait until it receives 3 inputs into the pool. If no one else is sending, it will just keep waiting.

the message is away now. I didn't touch. now there is darkSend Status => Idle again

but it didn't work. Nothing arrived at destination....

Darksend timed out waiting for participants. Not enough transfers to mix with. (needs at least 3.)
Until more people are using darksend, you can create 3 darksends yourself to see it work.
sr. member
Activity: 294
Merit: 250
I don't really mind the price going down, but I can't say I'm not surprised. I was not expecting a huge rise but not a downtrend either ^^

Look at the volume and behaviour (psychology)

 

Someone dumped 3k+ and got instantly snatched. Volume is ridiculous, driving price low. There was no official date for the soft "spork"  Grin - Most MN investors are in. The others haven't still found out payments are working. Others may have gotten burnt panic selling their nodes last 2 forks, and waiting a little more to get back in.

Top investors are monitoring, but with no fixed date, they had no reference to plunge their claws on. But these latter are technically savvy, and wont be storming in (as they dont live all happy together in a fraternity), as these are top dollars and dont mind the mark-up.

 And this is just RC3. Real magic is in RC4. Then RC5 (open source) will make it ludicrous. Bye bye LTC.

Expect the price to rise in the next few days. No mega panic buy, no pumps (as these would be suicide)... the healthiest of rides.

Its going to be magic.



I'm not in a hurry, I still think it's going to be hard to reach 0.025 as many will want to cut their "loss" or go for P&D coins. After that though, there won't be much to sell anymore
legendary
Activity: 1197
Merit: 1000
hi - my pool (https://www2.coinmine.pl/drk/) has updated wallet and paid few blocks for masternodes but last 3 blocks were not paid - anyone knows why is that?
legendary
Activity: 1092
Merit: 1000
I don't really mind the price going down, but I can't say I'm not surprised. I was not expecting a huge rise but not a downtrend either ^^

Look at the volume and behaviour (psychology)

 

Someone dumped 3k+ and got instantly snatched. Volume is ridiculous, driving price low. There was no official date for the soft "spork"  Grin - Most MN investors are in. The others haven't still found out payments are working. Others may have gotten burnt panic selling their nodes last 2 forks, and waiting a little more to get back in.

Top investors are monitoring, but with no fixed date, they had no reference to plunge their claws on. But these latter are technically savvy, and wont be storming in (as they dont live all happy together in a fraternity), as these are top dollars and dont mind the mark-up.

 And this is just RC3. Real magic is in RC4. Then RC5 (open source) will make it ludicrous. Bye bye LTC.

Expect the price to rise in the next few days. No mega panic buy, no pumps (as these would be suicide)... the healthiest of rides.

Its going to be magic.

legendary
Activity: 1484
Merit: 1007
spreadcoin.info
newbie
Activity: 28
Merit: 0
Good god, don't make me ask you about your childhood. Why does this gif infuriate you so much, and what will happen to you once I show the next gif I am preparing?  Grin
/jk

http://image.noelshack.com/fichiers/2014/26/1403796545-111hk.jpg
Jump to: