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The blockchain offers excellent privacy. However, it is not true that blockchain transactions are anonymous in contrast to long held early beliefs. Indeed, blockchain transactions are traceable and with some efforts in deduction, resonable conclusions about them may be made. While great efforts are made to improve blockchain privacy, your use of blockchain payments systems which operate on a PUBLIC ledger is your consent to make this information publically available. Thus, you should never have any misplaced expectation of privacy where none exists.
Unlike the fatal flaw in bank card systems, your 'spedning authority' is 100% private and never exposed to hackers. Therefore, you can always be very assured that it remains impossble for anyone to gain access to your funds merely by examining blockchain transactions. Fraudulent use of your money is fully eliminated.
Where possible, Rocketfuel payment protocols deploy best efforts encryption schemes to mitigate exposure of all information including product address schemes. A Rocketfuel ecommerce transaction looks like all blockchain transactions and in indistinguishable from any others.