Monero's Ring Confidential Transaction is really superior to other comparable coins like Dash /Zcash/ Zen . It uses complex public key and index pairing across the whole platform to generate ring signs indicating movement of funds, but the originator of the transaction cannot be distinguished from the rest of the signers. It accomplishes this by using "key vectors" which are a collection of public keys with corresponding private keys. Very difficult to see where, who, or what was transacted .. This accounts for less loose ends which arguably makes it safer than dash.