Editing RC4 (section)

===RC4<sup>+</sup>===
RC4<sup>+</sup> is a modified version of RC4 with a more complex three-phase key schedule (taking about three times as long as RC4, or the same as RC4-drop512), and a more complex output function which performs four additional lookups in the S array for each byte output, taking approximately 1.7 times as long as basic RC4.<ref name ="rc4+">{{Citation |chapter=Analysis of RC4 and Proposal of Additional Layers for Better Security Margin |chapter-url=http://eprint.iacr.org/2008/396 |author1=Subhamoy Maitra |author2=Goutam Paul |title=Progress in Cryptology - INDOCRYPT 2008 |date=19 September 2008 |pages=27–39 |series=Lecture Notes in Computer Science |volume=5365 |publisher=Springer-Verlag |isbn=978-3-540-89753-8 |doi=10.1007/978-3-540-89754-5_3 |id=Cryptology ePrint Archive: Report 2008/396 |access-date=2011-11-04|url=http://eprint.iacr.org/2008/396.pdf |citeseerx=10.1.1.215.7178 }}</ref>

 <span style="color: green;">''All arithmetic modulo 256.  ''<<'' and ''>>'' are left and right shift, ''⊕'' is exclusive OR''</span>
 '''while''' GeneratingOutput:
     i := i + 1
     a := S[i]
     j := j + a
     
     Swap S[i] and S[j]               <span style="color: green;">(''b := S[j]; S[j] := S[i]; S[i] := b;'')</span>
     
     c := S[i<<5 ⊕ j>>3] + S[j<<5 ⊕ i>>3]
     '''output''' (S[a+b] + S[c⊕0xAA]) ⊕ S[j+b]
 '''endwhile'''

This algorithm has not been analyzed significantly.