| Thayer. R. The ESP ARCFOUR algorithm. Internet Draft, draft-ietf-ipsec-cipharcfour -00.txt, June 1997, available at ftp://ftp.ietf.org/internet-drafts/draft-ietf-ipsecciph -arcfour-00.txt. |
....for smart card environments, the state contents can be recovered in approximately 10 operations. 1 Introduction Arcfour is a stream cipher recently proposed to the Internet Engineering Task Force [3] and has been included in several other IETF documents, including an IPSEC Internet Draft [4]. Arcfour operates on variable length keys, to produce a byte keystream B = fb i g i=0 , and is implemented as a finite state machine. The current state is given by a permutation S of 0; 1; 255 and by two byte pointers x; y into S, which are used in the generation of the initial state ....
Thayer. R. The ESP ARCFOUR algorithm. Internet Draft, draft-ietf-ipsec-cipharcfour -00.txt, June 1997, available at ftp://ftp.ietf.org/internet-drafts/draft-ietf-ipsecciph -arcfour-00.txt.
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