http://b5tp7oigc56uobn5npxlyg5iomhjhc3gbk2dpys6wcsnxlhmqmibxqyd.onion/blog/are-bitcoin-mixing-services-safe-and-will-keep-my-anonymity.html
According to Satoshi Nakamoto, the founder of Bitcoin currency: “The possibility to be anonymous or pseudonymous relies on you not revealing any identifying information about yourself in connection with the bitcoin addresses you use. If you post your bitcoin address on the web, then you're associating that address and any transactions with it with the name you posted under.