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To: man-jp-reviewer@jp.FreeBSD.org
cc: kanou@mil.allnet.ne.jp
From: KANOU Hiroki <kanou@mil.allnet.ne.jp>
In-reply-to: <004401c1f52e$16d8eb20$0300a8c0@3W1G31S>
Date: Tue, 07 May 2002 08:46:36 +0900
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X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+020417
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Subject: [man-jp-reviewer 4119] Re: From md5.3 R3.1 to R4.5
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$B<mLn$H?=$7$^$9!#(B

[man-jp-reviewer 4116] $B$N!"(B
> $B$=$3$G!"(Bmd5.1$B86J8$N!"(B
> MD5 has not yet (1999-02-11) been broken, but sufficient attacks have been
> made that its security is in some doubt.  The attacks on both MD4 and MD5
> are both in the nature of finding ``collisions'' \- that is, multiple
> inputs which hash to the same value; it is still unlikely for an attacker
> to be able to determine the exact original input given a hash value.
> $B$H$$$&$H$3$m$G$9$,!"(Bmd5.1$B$NLu$G$O$[$s$N>/$786J8$,0[$J$j$^$9$,<!$N$h$&$K$J$C$F$$(B
> $B$^$9!#(B
> 
>      MD5 $B$O$^$@(B (2001-09-03) $BGK$i$l$F$$$^$;$s$,!"%;(B
>      $B%-%e%j%F%#$KBP$9$k$$$/$i$+$N5?$$$r$b$?$i$9==J,$J967b$,$J$5$l$F$$$^$9!#(B
>      MD5 $B$KBP$9$k967b$O!"(B ``$B>WFM(B'' $B$r8+$D$1$k$H$$$&<oN`$N$b$N$G$9(B -- $B$9$J$o(B
>      $B$A!"J#?t$NF~NO$,F1$8CM$K%O%C%7%e$5$l$k$H$$$&$b$N$G$9!#$7$+$7$J$,$i!"%O%C(B
>      $B%7%eCM$+$i85$NF~NO$r@53N$K7hDj$9$k$3$H$O!"$^$@967b<T$K$H$C$F2DG=$G$O$J$5(B
>      $B$=$&$G$9!#(B
> 
> $B$3$3$J$s$G$9$,!"!H>WFM(B"$B$H$O2?$,>WFM$7$F$$$k$N$G$7$g$&$+(B?
> $B;d$O!"!VJ#?t$NF~NO$,F1$8CM$K%O%C%7%e$5$l$k!W$H(B
> $B!V%O%C%7%eCM$+$i85$NF~NO$r@53N$K7hDj$9$k$3$H$O!"$^$@967b<T$K$H$C$F2DG=$G$O$J$5(B
> $B$=$&!W(B
> $B$H$$$&Fs$D$N8+2r$,!"0BA4@-$N4QE@$G>WFM$7$F$$$k$H2r<a$7$?$N$G$9$,$I$s$J46$8$G$7(B
> $B$g$&(B?

$B%O%C%7%e4X?t$K5a$a$i$l$k@-<A$O!"!V0lJ}8~@-!W$H!VL5>WFM@-!W$NFs$D$,$"$j$^$9!#(B

$B!&M?$($i$l$?%P%$%HNs$HF1$8%O%C%7%eCM$r;}$D%P%$%HNs$rC5$9(B
$B!&%O%C%7%eCM$+$i!"85$N%P%$%HNs$NFbMF$rC5:w$9$k(B
$B$H$$$&;v$,!"40A4$JAmEv$?$j$h$j>.$5$J<j4V$G$G$-$F$7$^$&$H!"0lJ}8~@-%O%C%7%e(B
$B4X?t$H$7$F$NLr$KN)$A$^$;$s!#$3$l$i$N967b$KBP$7$F$O(B MD5 $B$O8=:_$G$b0BA4$G$9!#(B

$B$7$+$7!"(B
$B!&$H$K$+$/2?$G$b$$$$$+$i%O%C%7%eCM$,>WFM$9$k(B($BF1$8CM$K$J$k(B)2$B8D$NCM$NBP$rF@$k(B
($BL5>WFM@-$rGK$k(B) $B$@$1$G$h$1$l$P!"7W;;NL$O$:$C$H>/$J$/$J$j$^$9!#(B

$B$3$l$O(B Birthday $B967b$H8@$C$F!"0lHL$K%S%C%HD9$NH>J,$@$1$N<j4V$G:Q$_$^$9!#(B
$BCM$N6u4V$,(B 128 $B%S%C%H$J$i!"(B2^64 $B8D$NCM$r%i%s%@%`$K@8@.$7$F$=$l$i$N%O%C%7%e$r(B
$B5a$a$l$P!"$=$NCf$N$I$l$+(B 1 $BAH$O!"F1$8CM$r;}$D$3$H$,4|BT$G$-$^$9!#(B2^64 $B$O!"(B
$B8=:_$N7W;;NO$G(B($BJ,;6%3%s%T%e!<%F%#%s%0Ey$rMQ$$$F(B)$B8=<BE*$K<j$NFO$/HO0O$K(B
$B$J$C$F$-$F$*$j!"0BA4$H$O8@$($^$;$s(B ($B:GDc(B 160 $B%S%C%H$OI,MW$H$5$l$F$$$^$9(B)$B!#(B
$B!tEE;R=pL>$N%"%k%4%j%:%`$N0BA4@-$r3NJ]$9$k$K$O!"$3$l$,I,MW$i$7$$$G$9!#(B
$B!t$3$l$K$D$$$F$ONI$/J,$+$i$J$$$N$G!">e5-$N85%M%?(B (IPA $B$,=P$7$F$$$k(B Cryptrec 
$B!t(BReport 2001) $B$rFI$s$G$/$@$5$$!#(B

$B<mLn(B $B9(<y(B  <kanou@mil.allnet.ne.jp>
