And vendors. https://www.technologyreview.com/s/608716/bitcoin-transactions-arent-as-anonymous-as-everyone-hoped/ https://www.technologyreview.com/s/608716/bit

And vendors. https://www.technologyreview.com/s/608716/bitcoin-transactions-arent-as-anonymous-as-everyone-hoped/ https://www.technologyreview.com/s/608716/bitcoin-transactio... And if your id is leaked in one transaction, it links your id to all other transactions done with that wallet.