An Effective Fair Off-Line Electronic Cash Protocol using Extended Chaotic Maps with Anonymity Revoking Trustee

Along with the proliferation of cyberspace and the beginning of electronic trade, many electronic cash protocols were suggested. Electronic cash allows digital coins to be exchanged with value guaranteed by the signature of the financial institution and the hidden identity of the client. A client can withdraw money from the financial institution in an electronic cash protocol and then anonymously and unlinkably spend each coin. The present article suggests a practical, fair offline electronic cash protocol using extended chaotic maps capable of coin locating and seller locating. Under certain conditions, the protocol’s anonymity perchance was revoked from an offline trusted third party. The trustworthy third party verifies the financial institution’s e-coin signature in our protocol and then logs the location of data that isn’t part of the normal electronic cash protocol.