Please tell me where I can read the latest information about the Dash's PrivateSend system and compare its security with other cryptocurrencies, for example, monero, zcash?
https://docs.dash.org/en/stable/introduction/features.html#privatesendWith Dash the privacy on its transactions is optional as is the level of its privacy.
The more rounds of mixing is used, the higher the level of privacy users get on their transactions.
Dash has a default number of rounds of mixing set on 4 rounds. This can be lowered (which will cause a weaker level of privacy)
or increased all the way up to 16 rounds (which will provide a higher level of privacy).
Since Dash PrivateSend originated from Bitcoin's Coinjoin (but then optimized and integrated into Dash core, with more rounds to mix), it has also
inherited some weak points of CoinJoin.
* having a very low anonymity set (2 rounds of mixing for example) weakens Dash privacy
* using a large amount of inputs (10 or more) weakens Dash privacy (Dash wallet warns users for this)
* using a fixed wallet address before and after mixing (an exchange wallet address for example) weakens Dash privacy
* sending the exact same amount as before the mixing weakens Dash privacy
The added benefit of Dash using PrivateSend is that it is not all that different to privacy mixing occurring on the Bitcoin network through CoinJoin.
From a regulatory point of view this makes Dash PrivateSend equal to CoinJoin mixing on the Bitcoin network, which makes Dash equal to Bitcoin.
Link :
https://blog.dash.org/dash-complies-with-the-financial-action-task-force-fatf-guidelines-including-the-travel-rule-a4c658efc89d* there is a comparison between Dash, Bitcoin, Monero and Zcash privacy implementation in above link
In short :
Also there is this :
https://cointelegraph.com/news/researchers-claim-999-of-zcash-transactions-are-traceableZcash
A study into the traceability of top privacy coins reveals over 99% of Zcash users fail to utilize the protocol’s privacy features.
Monero
The paper also examines a number of further upgrades introduced to the protocol from 2017 onwards, finding that less than one percent of transactions carried out using XMR over the last two years were traceable according to most methods of analysis employed.
However, one model was still able to reveal transaction inputs with an accuracy of 30%.
I suspect the above mentioned model that could reveal Monero transactions with an accuracy of 30%, focuses on Monero transactions
before 2017.
Link :
https://www.wired.com/story/monero-privacy/Dash PrivateSend transactions having the default number of rounds of mixing (4 rounds) or PrivateSend transactions having a higher rounds of mixing have to this day
never been traced back to the sender.
There was an effort from a certain individual named Flenst (who has a connection to Monero) to crack the Dash privacy, but that effort focused on Dash transactions
with a very low anonymity set (2 rounds of mixing), combined with fixed wallet addresses being used before and after mixing. That effort turned out to be inconclusive though,
as faults and inconsistencies were found in this person's calculations.
It does stress the importance for Dash users that want to have good privacy on their transactions to understand the weak points of Coinjoin / Dash PrivateSend and
realise that their own actions (for example lowering the number of rounds to mix), can directly affect the privacy on their transactions.
