Speaking of technical discussion, Dash's privacy scheme is being (unfavorably) compared to Cryptonote.
The discussion is being held on Monero's StackExchange, because Dash by a wide margin failed to qualify for StackExchange
and never will because it is a community of get-rich-quick low information types unlike the high brow SE.
http://monero.stackexchange.com/questions/112/how-is-monero-compared-to-dashPrivateSend does have a potentially serious flaw.
Each coinjoin requires a server to facilitate the mixing. This requires users to trust that the server is not recording details on where each user's outputs are ending up. Dash attempts to mitigate this risk by using what they call "masternodes". Masternodes are the servers which coordinate PrivateSend. These masternodes require a deposit of 1000 Dash to run. In theory, this collateral prevents someone from creating an arbitrary number of nodes for the purpose of recording coinjoin details.
Does this really mitigate the risk of coinjoin details being recorded, enabling transactions to be traced? Not reliably. The reality is that the majority of masternodes are hosted by a small number of VPS providers. These VPS providers could easily record the transactions being facilitated by any masternode that they host.
Please respond here or on SE if you have any substantive input to make on this important issue (price comparison/speculation does not count).
the vps providers could record transactions but it would not do them any good. you need to control or have access to ~90% of the mn or transactions to deanonymize ~1% of all transactions. since these vps providers are different and spread all over the world no one entity or government has access or legal jurisdiction to that info. somewhere there is a chart showing the exact mathematical probabilities. i'll try to find it or maybe someone can post it, i think tante has the info.
Why aren't the "exact mathematical probabilities" subject to the Birthday Paradox, in which far fewer adversarial Sybil nodes than one might guess are needed to unravel the entire Coinjoin sweater?
You seem to be asserting Masternodes benefit from some kind of inverse Birthday Paradox relationship, where everything just happens to luckily work out for the best.
It would be nice if exact numbers were available for evaluation on neutral ground such as StackExchange, or an equivalent with less stringent requirements that Dash actually might be able to meet.
If Tante can find the obscure/exotic proof for your claims, perhaps she may also submit it for discussion on the Monero SE comparison thread.