A Stream Cipher Encryption Algorithm 'Arcfour'

Document Type Expired Internet-Draft (individual)
Authors Rodney Thayer  , Kalle Kaukonen 
Last updated 1999-07-14
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes an algorithm here called Arcfour that is believed to be fully interoperable with the RC4 algoritm. RC4 is trademark of RSA Data Security, Inc. There is a need in the Internet community for an encryption algorithm that provides interoperable operation with existing deployed commercial cryptographic applications. This interoperability will allow for a smoother transition to protocols that have been developed through the IETF standards process.


Rodney Thayer (rodney@tillerman.tom)
Kalle Kaukonen (kalle@ssh.fi)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)