Just fast keying: Key agreement in a hostile internet

William Aiello*, Steven M. Bellovin, Matt Blaze, Ran Canetti, John Ioannidis, Angelos D. Keromytis, Omer Reingold

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


We describe Just Fast Keying (JFK), a new key-exchange protocol, primarily designed for use in the IP security architecture. It is simple, efficient, and secure; we sketch a proof of the latter property. JFK also has a number of novel engineering parameters that permit a variety of tradeoffs, most notably the ability to balance the need for perfect forward secrecy against susceptibility to denial-of-service attacks.

Original languageEnglish
Pages (from-to)242-273
Number of pages32
JournalACM Transactions on Information and System Security
Issue number2
StatePublished - May 2004
Externally publishedYes


  • Cryptography
  • Denial-of-service attacks


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