Source : Free On-Line Dictionary of Computing

Internet Open Trading Protocol
     
         (IOTP, Formerly "Open Trading Protocol",
        OTP) A specification that provides an interoperable framework
        for Internet commerce.  It is optimised for the case where the
        buyer and the merchant do not have a prior acquaintance and is
        payment system independent.  It will be able to encapsulate
        and support payment systems such as {SET}, {Mondex},
        CyberCash's {CyberCoin}, DigiCash's {e-cash}, GeldKarte, etc.
        IOTP is able to handle cases where such merchant roles as the
        shopping site, the payment handler, the deliverer of goods or
        services, and the provider of customer support are performed
        by different Internet sites.
     
        The IOTP specification is maintained by the {IETF} {Internet
        Open Trading Protocol (trade) Working Group
        (http://www.ietf.org/html.charters/trade-charter.html)}.
     
        {Home (http://www.otp.org/)}.
     
        (2001-09-22)