To all PGP users: We would like to make you aware of a new tool, called PathServer, for use with the "Pretty Good Privacy" (PGP) key management and encryption software. PathServer is a tool to help users to determine to whom a public key belongs, i.e., to "authenticate" the key. PathServer returns an active graphical representation of disjoint paths from a trusted key to the query key. PathServer helps support user authentication policies requiring that no single introducer is relied upon multiple times for information regariding a key. PathServer can be accessed at http://akpublic.research.att.com/~reiter/PathServer We welcome and appreciate any comments or suggestions. Send any comments to reiter@research.att.com or stubblebine@research.att.com. PathServer is an experimental service that is still under development, and thus it will likely be unreliable and slow for a while. Thanks in advance for your patience. Mike Reiter Stuart Stubblebine