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>  PPTP $B$N5,3J$=$N$b$N$K$O0E9f$O4^$^$l$F$J$/$F!"(BWinNT RAS (Remote
>Access Server) $B$N<BAu$K0E9f$,4^$^$l$F$^$9!#(BPPP $B$N(B CCP (Compression
>Control Protocol) $B$r3HD%$7$F!"05=L$K$D$$$F8r>D$,@.N)$9$l$PAj8_$K0E9f2=(B
>$B$7$FAw$j$"$&$h$&$K$J$C$F$$$^$9!#0E9f80$K$O(B MS-CHAP $B$G6&M-$r3NG'$7$?%Q(B
>$B%9%o!<%I$,;H$o$l$^$9!#(B
>  $B0E9f%"%k%4%j%:%`$O3N$+(B RSA $B$N(B RC4 $B$G$9!#(BRC4 $B$O%"%k%4%j%:%`$,HkL)$K$J$C(B
>$B$F$$$?$N$G$9$,!"5U%3%s%Q%$%k$7$?%=!<%9$,(B news $B$KN.$l$F0l;~4|BgA{$.$K$J(B
>$B$j$^$7$?!#%U%j!<%=%U%H%&%'%"$K>e5-$N(B RC4 $B$N%=!<%9$r4^$a$k$3$H$O!"(B($BK!N'(B
>$B>e$O$H$b$+$/(B)$BLLE]$N$b$H$K$J$j$=$&$@!"$H8@$o$l$F$^$9!#(B

	http://dcs.ex.ac.uk/~aba/rc4.html
	RC4 in 3 lines of perl

	$B$H$$$&%Z!<%8$K$h$k$H!"(B

>Legal status
>
>RC4 is a symmetric stream cipher designed by RSADSI. This cipher
>used to be trade secret of RSADSI, but some anonymous person
>distributed the source code on the internet last year. It is
>not known whether the code was "leaked" by a source license 
>holder or whether someone reverse engineered one of the libraries
>which used RC4. In either case now that it is no longer a trade
>secret you can use it legally without paying RSA. Using RC4 
>in a commercial product without buying a license from RSADSI,
>whilst technically legal, would be impolite, and it is possible
>that RSADSI may take it upon themselves to reward you with a
>court case. If they do this it may turn out to be cheaper to
>buy a license than fight a protracted legal battle. 

	$B$H$"$j$^$9!#(BIn either case...$B$"$?$j$,%-%b$G$9$M!#(B

	$B?.Xa@-$K$D$$$F$O:F3NG'$,I,MW$G$7$g$&$,!#(B

	$B$J$s$>$*<jEA$$$G$-$k$3$H$,$"$C$?$i!"$*<jEA$$$7$^$9!#(B
	$B$3$s$JM}M3$G!V(BSamba$B$OBLL\$d!"(BNT$B$$$l$m!W$_$?$$$JOC$K$J$C$F6l$7$`(B
	$B4IM}<T$,$$$k$HHa$7$$$N$G!#(B

itojun
