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+Network Working Group                                   D. Eastlake, III
+Request for Comments: 3354                                      Motorola
+Category: Informational                                      August 2002
+
+
+                     Internet Open Trading Protocol
+                         Version 2 Requirements
+
+Status of this Memo
+
+   This memo provides information for the Internet community.  It does
+   not specify an Internet standard of any kind.  Distribution of this
+   memo is unlimited.
+
+Copyright Notice
+
+   Copyright (C) The Internet Society (2002).  All Rights Reserved.
+
+Abstract
+
+   This document gives requirements for the Internet Open Trading
+   Protocol (IOTP) Version 2 by describing design principles and scope
+   and dividing features into those which will, may, or will not be
+   included.
+
+   Version 2 of the IOTP will extend the interoperable framework for
+   Internet commerce capabilities of Version 1 while replacing the XML
+   messaging and digital signature part of IOTP v1 with standards based
+   mechanisms.
+
+Table of Contents
+
+   1. Introduction ...................................................2
+   2. Design Principles and Scope ....................................2
+   3. Requirements ...................................................2
+   4. Security Considerations ........................................4
+   References ........................................................4
+   Authors Addresses .................................................5
+   Full Copyright Statement ..........................................6
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+Eastlake                     Informational                      [Page 1]
+
+RFC 3354                  IOTP V2 Requirements               August 2002
+
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+1. Introduction
+
+   Version 2 of the Internet Open Trading Protocol (IOTP) will extend
+   the interoperable framework for Internet commerce capabilities of
+   Version 1 [RFC 2801] as described in Section 3 below.  In addition,
+   it will replace the ad hoc XML messaging and digital signature [RFC
+   2802] parts of IOTP v1 with standards based mechanisms [RFC 3275].
+
+   This document gives requirements for the Internet Open Trading
+   Protocol (IOTP) Version 2 by describing design principles and scope
+   and dividing features into those which will, may, or will not be
+   included.
+
+2. Design Principles and Scope
+
+   1. The specification must describe the syntax and processing
+      necessary for an extension of the interoperable framework for
+      Internet commerce described in IOTP V1.0 [RFC 2801].
+
+   2. Keep changes to IOTP V1.0 to a minimum.
+
+   3. Maintain all existing functionality of IOTP V1.0.
+
+   4. Test all XML DTDs and/or Schemas and XML examples in the
+      specification to insure that they are well-formed.
+
+   5. Create usage/implementation guidance information, probably as a
+      separate document.
+
+   6. It should be designed to work well with other protocols such as
+      ECML [RFC 3106].
+
+   7. IOTP Version 2 should be developed as part of the broader Web
+      design philosophy of decentralization, URIs, Web data, and
+      modularity /layering / extensibility.  [Berners-Lee, WebData] In
+      this context, this standard should take advantage of existing
+      provider (and infrastructure) primitives.
+
+3. Requirements
+
+   IOTP Version 2 will include the following:
+
+   1. Be a superset of IOTP Version 1.
+
+   2. Provide for the Dynamic Definition of Trading Sequences.  I.E.,
+      transactions will not be limited, as with v1, to a single payment
+      and a single delivery with delivery occurring after payment.
+
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+
+Eastlake                     Informational                      [Page 2]
+
+RFC 3354                  IOTP V2 Requirements               August 2002
+
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+      Instead, it will be possible to propose an arbitrary sequence of
+      transaction steps.
+
+   3. Include specification of an Offer Request Block.
+
+   4. Support Improved Problem Resolution (extend to cover presentation
+      of signed receipt to customer support party, better defined
+      Customer Care role, etc.).
+
+   5. Add provisions to indicate and handle a payment protocol not
+      tunneled through IOTP.
+
+   6. Add support for server based wallets.
+
+   The following may be include in IOTP v2:
+
+   1. Support Repeated/ongoing payments.  For example, a means to
+      specify that a customer approval covers not only the instant
+      purchase but also some limited number of future purchase with some
+      total or per purchase spending limit.
+
+   2. Enhanced Server to Server messages.  For example, a means for a
+      Delivery Handler to inform a Payment Handler that goods have
+      actually shipped, which may be a pre-condition for making a charge
+      against a credit card.
+
+   3. Include the ability to add both fields and attributes to existing
+      trading blocks in addition to the present ability to add entirely
+      new trading blocks.
+
+   The following are out of scope for IOTP version 2:
+
+   1. Legal or regulatory issues surrounding the implementation of the
+      protocol or information systems using it.
+
+   2. Design of an XML Messaging Layer.  Instead, whatever is or appears
+      most likely to become the standard XML messaging layer will be
+      used.  This includes a standard enveloping, addressing, and error
+      reporting framework.
+
+   3. Design of XML Digital Signatures.  Instead, the existing standard
+      [RFC 3275] will be used.
+
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+Eastlake                     Informational                      [Page 3]
+
+RFC 3354                  IOTP V2 Requirements               August 2002
+
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+4. Security Considerations
+
+   As provided above, IOTP v2 will provide optional authentication via
+   standards based XML Digital Signatures [RFC 3275]; however, neither
+   IOTP v1 nor v2 provide a confidentiality mechanism.  Both require the
+   use of secure channels such as those provided by TLS [RFC 2246] or
+   IPSEC for confidentiality and depend on the security mechanisms of
+   any payment system used in conjunction with them to secure payments.
+
+References
+
+   [Berners-Lee] "Axioms of Web Architecture: URIs",
+                 <http://www.w3.org/DesignIssues/Axioms.html>, "Web
+                 Architecture from 50,000 feet",
+                 <http://www.w3.org/DesignIssues/Architecture.html>.
+
+   [RFC 2026]    Bradner, S., "The Internet Standards Process --
+                 Revision 3", BCP 9, RFC 2026, October 1996.
+
+   [RFC 2246]    Dierks, T. and C. Allen, "The TLS Protocol: Version
+                 1.0", RFC 2246, January 1999.
+
+   [RFC 2801]    Burdett, D., "Internet Open Trading Protocol - IOTP
+                 Version 1.0", RFC 2801, April 2000.
+
+   [RFC 2802]    Davidson, K. and Y. Kawatsura, "Digital Signatures for
+                 the v1.0 Internet Open Trading Protocol (IOTP)", RFC
+                 2802, April 2000.
+
+   [RFC 3106]    Eastlake, D. and T. Goldstein, "ECML v1.1: Field Names
+                 for E-Commerce", RFC 3106, April 2001.
+
+   [RFC 3275]    Eastlake, D., Reagle, J. and D. Solo, "XML-Signature
+                 Syntax and Processing", RFC 3275, March 2002.
+
+   [WebData]     "Web Architecture: Describing and Exchanging Data",
+                 <http://www.w3.org/1999/04/WebData>.
+
+   [XML]         "Extensible Markup Language (XML) 1.0 (Second
+                 Edition)", <http://www.w3.org/TR/1998/REC-xml>, T.
+                 Bray, J. Paoli, C. M. Sperberg-McQueen.
+
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+Eastlake                     Informational                      [Page 4]
+
+RFC 3354                  IOTP V2 Requirements               August 2002
+
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+Author's Addresses
+
+   Donald E. Eastlake 3rd
+   Motorola
+   155 Beaver Street
+   Milford, MA 01757 USA
+   Phone: +1-508-851-8280 (w)
+          +1-508-634-2066 (h)
+   EMail: Donald.Eastlake@motorola.com
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+Eastlake                     Informational                      [Page 5]
+
+RFC 3354                  IOTP V2 Requirements               August 2002
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+Full Copyright Statement
+
+   Copyright (C) The Internet Society (2002).  All Rights Reserved.
+
+   This document and translations of it may be copied and furnished to
+   others, and derivative works that comment on or otherwise explain it
+   or assist in its implementation may be prepared, copied, published
+   and distributed, in whole or in part, without restriction of any
+   kind, provided that the above copyright notice and this paragraph are
+   included on all such copies and derivative works.  However, this
+   document itself may not be modified in any way, such as by removing
+   the copyright notice or references to the Internet Society or other
+   Internet organizations, except as needed for the purpose of
+   developing Internet standards in which case the procedures for
+   copyrights defined in the Internet Standards process must be
+   followed, or as required to translate it into languages other than
+   English.
+
+   The limited permissions granted above are perpetual and will not be
+   revoked by the Internet Society or its successors or assigns.
+
+   This document and the information contained herein is provided on an
+   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
+   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
+   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
+   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
+   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+
+Acknowledgement
+
+   Funding for the RFC Editor function is currently provided by the
+   Internet Society.
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+Eastlake                     Informational                      [Page 6]
+