ENUM -- Telephone Number Mapping A. Mayrhofer Working Group enum.at Internet-Draft D. Lindner Expires: February 20, 2006 SIL August 19, 2005 IANA Registration for Enumservice vCard draft-mayrhofer-enum-vcard-00 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on February 20, 2006. Copyright Notice Copyright (C) The Internet Society (2005). Abstract This memo registers the Enumservice "vCard" using the URI schemes "http" and "https" according to the IANA Enumservice registration process described in RFC3671. This Enumservice is to be used to refer from an ENUM domain name to the vCard of the entity using the corresponding E.164 number. Clients may use information gathered from those vCards before, during Mayrhofer & Lindner Expires February 20, 2006 [Page 1] Internet-Draft vCard Enumservice August 2005 or after inbound or outbound communication takes place. For example, a callee might be presented with the name and association of the caller before he picks up the call. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. ENUM Service Registration - vCard . . . . . . . . . . . . . . 3 3. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Security & Privacy Considerations . . . . . . . . . . . . . . 4 4.1 The Record Itself . . . . . . . . . . . . . . . . . . . . 4 4.2 The Resource Identified . . . . . . . . . . . . . . . . . 4 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 5 Intellectual Property and Copyright Statements . . . . . . . . 7 Mayrhofer & Lindner Expires February 20, 2006 [Page 2] Internet-Draft vCard Enumservice August 2005 1. Introduction The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [4]. ENUM [1] uses the Domain Name System (DNS) [2] for mapping E.164 numbers [7] to Uniform Resource Identifiers (URIs) [3]. E.164 numbers are converted to ENUM domain names through means described further in RFC3761 [1]. "vCard" [8] is a transport independent data format for exchange of personal data. For the purpose of this document, the term "vCard" refers to a specific instance of this data format - an "electronic business card". vCards are exchanged via several protocols, usually they are distributed as electronic mail attachments or as standalone documents via web servers. Most popular personal information manager applications are capable of reading and writing vCards. The Enumservice described in this document refers from an ENUM domain to a vCard using the URI schemes "http" [6] and "https" [5]. The resource identified MUST be a valid vCard. 2. ENUM Service Registration - vCard Enumservice Name: "vCard" Enumservice Type: "vcard" Enumservice Subtypes: N/A URI Schemes: "http", "https" Functional Specification: This Enumservice indicates that the resource identified is a vCard. Security Considerations: see Section 4 Intended Usage: COMMON Authors: David Lindner, Alexander Mayrhofer (see 'Authors' section for contact details) 3. Example An example ENUM entry referencing to a vCard could look like: Mayrhofer & Lindner Expires February 20, 2006 [Page 3] Internet-Draft vCard Enumservice August 2005 $ORIGIN 4.3.6.1.4.6.5.0.5.1.3.4.e164.arpa. @ IN NAPTR 100 10 "u" "E2U+vcard" "!^.*$!http://www.enum.at/vcard-axelm.vcf!" . 4. Security & Privacy Considerations 4.1 The Record Itself Since ENUM uses DNS - a publicly available database - any information contained in records provisioned in ENUM domains must be considered public as well. Even after revoking the DNS entry and removing the refered resource, copies of the information could still be available. Information published in ENUM records could reveal associations between E.164 numbers and their owners - especially if records contain personal identifiers or domain names for which ownership information can easily be obtained. However, it is important to note that the ENUM record itself does not need to contain any personal information. It just points to a location where access to personal information could be granted. ENUM records pointing to third party resources can easily be provisioned on purpose by the ENUM domain owner - so any assumption about the association between a number and an entity could therefore be completely bogus unless some kind of identity verification is in place. This verification is out of scope for this memo. 4.2 The Resource Identified Users SHOULD carefully consider information they provide in the resource identified by the ENUM record. Considerations SHOULD include serving information only to entities of the user's choice and/or limiting the comprehension of the information provided based on the requesting entity. On the other hand, most of the information which a vCard would typically contain is already available via more "traditional" sources like white pages and online directories. Therefore, publishing a vCard on the internet and associating it to a phone number does not increase the amount of available information at all if the information was already public before. If access restrictions are deployed, Standard HTTP mechanisms MUST be used to enforce those restrictions. HTTPS SHOULD be preferred if the deployed mechanisms are prone to eavesdropping and replay attacks. Mayrhofer & Lindner Expires February 20, 2006 [Page 4] Internet-Draft vCard Enumservice August 2005 5. IANA Considerations This memo requests registration of the "vCard" Enumservice without any subtypes according to the definitions in this document and RFC3761 [1]. 6. References [1] Faltstrom, P. and M. Mealling, "The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (DDDS) Application (ENUM)", RFC 3761, April 2004. [2] Mockapetris, P., "Domain names - Implementation and Specification", STD 13, RFC 1035, November 1987. [3] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifiers (URI): Generic Syntax", RFC 2396, August 1998. [4] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [5] Rescorla, E., "HTTP Over TLS", RFC 2818, May 2000. [6] Fielding, R., Gettys, J., Mogul, J., Frystyk, H., Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999. [7] ITU-T, "The international public telecommunication numbering plan", Recommendation E.164, May 1997. [8] Internet Mail Consortium, "Personal Data Interchange - vCard and vCalendar", September 1996. Authors' Addresses Alexander Mayrhofer enum.at GmbH Karlsplatz 1/9 Wien A-1010 Austria Phone: +43 1 5056416 34 Email: alexander.mayrhofer@enum.at URI: http://www.enum.at/ Mayrhofer & Lindner Expires February 20, 2006 [Page 5] Internet-Draft vCard Enumservice August 2005 David Lindner Silver Voice over Internet Protocol GmbH Lorenz-Mandl-Gasse 33/1 A-1160 Wien Austria Phone: +43 1 4933256 Email: d.lindner@sil.at URI: http://www.sil.at/ Mayrhofer & Lindner Expires February 20, 2006 [Page 6] Internet-Draft vCard Enumservice August 2005 Intellectual Property Statement The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. 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Disclaimer of Validity This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM 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. Copyright Statement Copyright (C) The Internet Society (2005). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Mayrhofer & Lindner Expires February 20, 2006 [Page 7]