Privacy is becoming a more pressing issue in the Internet architecture. There are several reasons for this, including new or proposed legistlation in various countries, the Internet becoming more ubiquitous and mobile, and changes in people's expectations. Furthermore, there are many different perspectives on network-related privacy, and some of these are based on different expectations with respect to privacy in different countries and cultures. The BOF has three distinct goals: 1. To initiate long-term architectural discussion on privacy within the community. One possible outcome of this would be chartering of a privacy research group at the IRTF. The goal of this work is to define exactly what network-related privacy means and to understand the breadth and depth of the problem. 2. To initiate shorter-term work to define how to implement and use the existing protocols in such a way that the privacy-sensitive information, such as a user's more-permanent network-layer identity, is not unnecessarily revealed, thereby compromising their network privacy. It is envisioned that a new working group crossing the Security and Internet Areas might be a suitable forum for this work, and that if such a working group is formed, it could also act as a common discussion forum to help in co-ordinating protocol-specific work; see the next item. 3. To briefly discuss some specific needs to modify existing protocols, such as Mobile IP, in order to improve their privacy properties. As a baseline, it is assumed that such work would probably be best conveyed in existing working or research groups, such as MIP4, MIP6 or MOBOPTS, whenever there is an active group for the protocol at hand. The focus of the proposed work will be on protecting communicating parties' privacy against eavesdroppers and other third parties. Therefore, unlinkability of various identifiers used in protocols is an important matter; see below. Focus will be on the internetworking layer (IP protocols) and layers close to it, with less attention paid to specific applications or physical layer issues. While it is necessary to understand link layer issues, proposals to change existing link layer protocols or to define new link layer protocols is explicitly out of scope. Location privacy in the sense of keeping location related information, such as the IP address, of a mobile host private from its active peers is explicitly out of scope. However, location privacy in the sense of keeping a given mobile user's location-related information private from third parties, i.e. hosts and nodes with which the node does *not* have active communication with, falls within the proposed scope.