$B0BA4$,I,MW$J%W%m%0%i%`$O!"967b $B$7$+$7!"$?$$$F$$$N%3%s%T%e!<%?$K$O??$KMp?t$rH/@8$9$k%O!<%I%&%'%"$O$D$$$F(B
$B$$$^$;$s!#$=$3$GMp?t$rH/@8$5$;$kJ}K!$,I,MW$K$J$k%1!<%9$,$[$H$s$I$G$9!#H/@8(B
$B$5$;$kJ}K!$O!"967b $B!V?dB,IT2DG=$J!W>uBV!#Dc%l%Y%k$N%G%P%$%9(B($B%-! $B0E9fMQ$K6/2=$7$?5<;wMp?tH/@84o(B(PRNG)$B!#$3$l$OFbIt>uBV$r;H$C$F!V%i%s%@%`!W(B
$B$J?t$rH/@8$7$^$9!#(B $BBg$-$J%S%C%H?t(B($B%7!<%I$H7k2L$H$7$F;H$o$l$?CM$NN>J}(B)$B!#(B
$B;H$($kCM$,$o$:$+$J$i!"6/NO$J(B PRNG $B$r;}$C$F$$$F$bL5BL$G$9!#M}M3$O!"967b PRNG $B$,K\Ev$K4m81$J$N$O!"%3%s%T%e!<%?8@8l$N%i%$%V%i%j$NBgH>$K!"5<;wMp?tH/@84o(B
(PRNG)$B$,Hw$o$C$F$$$kE@$K$"$j$^$9!#$3$l$O%;%-%e%j%F%#MQ$K$O(B$BITE,@Z(B$B$G$9!#(B
$B7+$jJV$7$^$7$g$&!#(B
$BI8=`E*$JMp?tH/@84o$r%;%-%e%j%F%#MQ$KMxMQ$7$J$$$G$/$@$5$$(B$B!#(B
$BI8=`E*$J(B PRNG $B%i%$%V%i%j$O%7%_%e%l!<%?$d%2!<%`8~$1Ey$K;H$o$l$k$b$N$G!"(B
$B80@8@.$N$h$&$J%;%-%e%j%F%#8~$1$N%i%s%@%`$5$r==J,$K(B$B;}$A9g$o$;$F(B
$B$$$^$;$s(B$B!#(B
$B0E9f2=$7$F$$$J$$(B PRNG $B%i%$%V%i%j$O!"!V@~7A9gF1K!$rMQ$$$?H/@84o!W7O$,B?$/!"(B
$B!V$N%"%k%4%j%:%`$b(B
$B$d$i$l$F$7$^$$$^$9(B[Schneier 1996]$B!#(B
$B$D$^$j!"0BA4$,I,MW$J%"%W%j%1!<%7%g%s$G$O!"0E9fE*$K6/8G$J(B PRNG $B$rMxMQ$7$F!"Mp?t(B
$B$r@8@.$7$J$1$l$P$$$1$^$;$s!#0lHLE*$JMp?t%i%$%V%i%j$G$O==J,$G$O$"$j$^$;$s!#(B $B80MQ$K??$NMp?t$r@5$7$/@8@.$G$-$J$$$H!"LdBj$,$$$m$$$mH/@8$7$^$9!#(BKerberos
$B$d(B X Window System$B!"(BNFS $B$N%;%-%e%j%F%#%[!<%k$,$=$l$G$9(B[Venema 1996]$B!#(B $B$G$-$k$@$1!"%7%9%F%`$KMQ0U$5$l$F$$$k%5!<%S%9$r;H$&$Y$-$G$9(B($B0lHLE*$K$O(B
$B%*%Z%l!<%F%#%s%0%7%9%F%`$,MQ0U$7$F$$$k$b$N(B)$B!#$=$N$h$&$J%5!<%S%9$O!"(B
$B0BA4$JMp?t$rDs6!$G$-$k$h$&$KFC$K@_7W$7$F:n$i$l$F$$$k$+$i$G$9!#(B
$B$?$H$($P!"(BLinux $B%+!<%M%k(B(1.3.30 $B$+$i(B)$B$OMp?t@8@.4o$r;}$C$F$$$F!"%;%-%e%j%F%#MQ(B
$B$K==J,BP1~$G$-$^$9!#(B
$B$3$NMp?t@8@.4o$O!"<~0O$GH/@8$9$k%N%$%:$r%G%P%$%9%I%i%$%P$dB>$N>pJs8;$+$i(B
$B<}=8$7$F!"%(%s%H%m%T!l9g$O!"<~0O$+$i%N%$%:$,=8$^$C$F$/$k$^$G!"8F$S=P$7$r%V%m%C%/(B
$B$7$^$9(B)$B!#(B
/dev/urandom $B$G%"%/%;%9$7$F!"Bg$-$JCM$rMW5a$9$k$H!"%(%s%H%m%T!\$7$$>pJs$O!"%7%9%F%`$K$"$k%*%s%i%$%s%^%K%e%"%k$N(B random(4)$B$r;2>H(B
$B$7$F$/$@$5$$!#(B $B%7%9%F%`$K$h$C$F$O!"??$K%i%s%@%`$J7k2L$rF@$k$N$K!"B>$N $B<+J,$G6/NO$J(B PRNG $B$r
$BDL>o!"(BPRNG $B$OFbIt>uBV$r;H$C$F80$r@8@.$7$^$9!#$=$NCM$d$=$NB>$N?dB,$G$-$J$$(B
$BF~NO$r;H$C$F>uBV$r99?7$7$^$9!#(B
$B$3$N;EAH$_$r967b$9$kJ}K!$O$?$/$5$s$"$j$^$9!#(B
$B$?$H$($P!"967b