Single Packet Authorization with FwknopMarch, 2014, Note: This article proposed the fwknop vision for SPA in 2005, and concept has been greatly extended and enhanced since then. The most updated information about SPA can be found in the fwknop tutorial and the fwknop design goals. Michael Rash Founder | Cipherdyne.org December, 2005 Introduction: One year ago in the December, 2004 issue of USENIX ;login: Magazine, I described a techniq
