http://z27wmjswte2mic5n2xvwexbzirxjgbhelx2ut6nynv3gmknzzc454lad.onion/blog_page=6.php
Using what in cryptocurrency development circles are known as ‘cryptographic ring signatures,’ Monero adds complete stealth and 'unlinkability' to XMR transactions. This means that even if authorities are aware of a Monero wallet address, no one can independently verify a wallet balance, nor see whom funds are sent and received between.