1. GEOPRIV Layer 7 Location Configuration Protocol; Problem Statement and Requirements draft-tschofenig-geopriv-l7-lcp-ps-03.txt Hannes Tschofenig, Henning Schulzrinne IETF 67, San Diego, November 2006

2. Design Team Henning Schulzrinne Barbara Stark Marc Linsner James Winterbottom Martin Thomson Rohan Mahy Brian Rosen Jon Peterson Hannes Tschofenig Andrew Newton

3. Reminder: Purpose of Document Collect requirements and scenarios Capture discussions in the context of Geopriv L7 LCP

4. Rewritten Document 1. Introduction 2. Terminology 3. Scenarios 3.1. DSL Environment 3.2. WiMax-like Fixed Access 3.3. Wireless Access 4. Location Information Server (LIS) Discovery 5. Identifier for Location Determination 6. Location-by-Reference and Location Subscriptions 7. Authenticated Calls and Signed Location Information 8. Requirements 9. IANA Considerations 10. Contributors 11. Acknowledgments 12. Security Considerations 13. Open Issues 1. Introduction 2. Terminology 3. Scenarios 3.1. Fixed Wired Environment 3.2. Moving Network 3.3. Wireless Access 4. Discovery of the Location Information Server 5. Identifier for Location Determination 6. Virtual Private Network (VPN) Considerations 6.1. VPN Tunneled Internet Traffic 6.2. VPN Client and End Point Physically Co-Located 6.3. VPN Client and End Point Physically Separated 7. Location-by-Reference and Location Subscriptions 8. Preventing Faked Location based DoS Attacks 8.1. Security Threat 8.2. Discussion about Countermeasures 9. Requirements 10. Security Considerations 10.1. Capabilities of the Adversary 10.2. Threats 10.3. Requirements 11. IANA Considerations 12. Contributors 13. Acknowledgements Old ToCNew ToC

5. Changes (1/4) Discovery of the Location Information Server: –Restructured discovery mechanisms to DHCP-based Discovery DNS-based Discovery Redirect Rule Multicast Query Identifier for Location Determination –Extended description of possible identifiers –Extended description of security properties

6. Changes (2/4) Virtual Private Network (VPN) Considerations –New section based on text proposed by Barbara. Location-by-Reference and Location Subscriptions –Extended based on a longer introduction.

7. Changes (3/4) Preventing Faked Location based DoS Attacks –New section –Starts with the security threats and discusses potential countermeasures with impact for the Geopriv L7 LCP: Location Signing Authenticated Calls Location by Reference Requirements –Mostly editorial aspects.

8. Changes (4/4) Security Considerations –More detailed threat classification based on Place-Shifting (PS) Time-Shifting (TS): Location-Theft (LT): Location-Identity-Theft (LIT): Location-Swapping (LS): –Provided a table that maps threats to possible countermeasures. ;

9. Next Steps Design team work finished. Authors suggest to close design team. Something missing in the document? Turn draft-tschofenig-geopriv-l7-lcp-ps- 03.txt into WG document? Initiate WGLC soon afterwards?