Authors' Addresses (Anschriften der Autoren)

Jason Fischl Skype, Inc. 2145 Hamilton Ave. San Jose, CA 95135 USA

Telefon: +1-415-692-1760 E-Mail: [email protected]

Hannes Tschofenig Nokia Siemens Networks Linnoitustie 6 Espoo, 02600 Finnland

Telefon: +358 (50) 4871445 E-Mail: [email protected] URI: http://www.tschofenig.priv.at

Eric Rescorla RTFM, Inc. 2064 Edgewood Drive Palo Alto, CA 94303 USA

E-Mail: [email protected]