DTN Research Group S. Farrell Internet-Draft Trinity College Dublin Intended status: Informational June 18, 2007 Expires: December 20, 2007 DTN Key Management Requirements draft-farrell-dtnrg-km-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 December 20, 2007. Copyright Notice Copyright (C) The IETF Trust (2007). Farrell Expires December 20, 2007 [Page 1] Internet-Draft DTN Key Management Requirements June 2007 Abstract This short document outlines requirements for DTN key management. It may or may not grow to specify some DTN key management schemes. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Key Management Requirements . . . . . . . . . . . . . . . . . . 4 3. Security Considerations . . . . . . . . . . . . . . . . . . . . 5 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5.1. Normative References . . . . . . . . . . . . . . . . . . . 7 5.2. Informative References . . . . . . . . . . . . . . . . . . 7 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 8 Intellectual Property and Copyright Statements . . . . . . . . . . 9 Farrell Expires December 20, 2007 [Page 2] Internet-Draft DTN Key Management Requirements June 2007 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 [1]. This document lists a set of putative requirements for key managment for DTN protocols, in particular the bundle protocol [2] with the aim of assisting in the development of workable key mangement schemes for the bundle security protocol [3]. Readers should also consult the DTN Architecure RFC [4] and the DTN Security Overview and Motivations document [5] which contains an overview of the current work on DTN security. Depending on what happens, this document might grow to include the specification of some key management schemes. Farrell Expires December 20, 2007 [Page 3] Internet-Draft DTN Key Management Requirements June 2007 2. Key Management Requirements 1. No single KM scheme will work for all DTNs therefore a set of schemes, or a framework, is REQUIRED. 2. All schemes MUST support some well-defined BSP ciphersuite(s). 3. At least one scheme SHOULD be defined for each of: 1. Manual keying, i.e. pre-shared secrets or pre-installed public keys; 2. Key transport & key agreement options. 4. Schemes SHOULD be able to use extension blocks to piggy-back KM information with application-data handling bundles. 5. Schemes MAY involve use of specific bundle payloads. 6. Some schemes MUST be defined using standard, well-known techniques (e.g. RSA key transport). 7. DTN node connectivity, computation and storage capabilities vary enormously, so some scheme for highly challenged nodes SHOULD be defined. Farrell Expires December 20, 2007 [Page 4] Internet-Draft DTN Key Management Requirements June 2007 3. Security Considerations This memo is entirely about security requirements. See above. Farrell Expires December 20, 2007 [Page 5] Internet-Draft DTN Key Management Requirements June 2007 4. IANA Considerations For now, there are none. If specific DTN key managmenet schemes are defined that meet these requirements, then an IANA registry, or entries in an IANA registry, MAY be required. Farrell Expires December 20, 2007 [Page 6] Internet-Draft DTN Key Management Requirements June 2007 5. References 5.1. Normative References [1] Bradner, S. and J. Reynolds, "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, October 1997. 5.2. Informative References [2] Scott, K. and S. Burleigh, "Bundle Protocol Specification", draft-irtf-dtnrg-bundle-spec-09.txt , April 2007. [3] Symington, S. and S. Farrell, "Bundle Security Protocol Specification". [4] Cerf, V., Burleigh, S., Hooke, A., Torgerson, L., Durst, R., Scott, K., Fall, K., and H. Weiss, "Delay-Tolerant Networking Architecture", RFC 4838 , April 2007. [5] Farrell, S., Symington, S., and H. Weiss, "Delay-Tolerant Network Security Overview", draft-irtf-dtnrg-sec-overview-02.txt , October 2006. Farrell Expires December 20, 2007 [Page 7] Internet-Draft DTN Key Management Requirements June 2007 Author's Address Stephen Farrell Trinity College Dublin Distributed Systems Group Department of Computer Science Trinity College Dublin 2 Ireland Phone: +353-1-608-1539 Email: stephen.farrell@cs.tcd.ie Farrell Expires December 20, 2007 [Page 8] Internet-Draft DTN Key Management Requirements June 2007 Full Copyright Statement Copyright (C) The IETF Trust (2007). 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. 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Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgment Funding for the RFC Editor function is provided by the IETF Administrative Support Activity (IASA). Farrell Expires December 20, 2007 [Page 9]