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<H2><A NAME="s5">5. PGP $B$H(B GnuPG</A></H2>

<P>$B$I$N%P!<%8%g%s$N(B <EM>PGP</EM> $B$r(B <EM>Mutt-i</EM> $B$G;H$&$K$7$F$b!":G=i$K(B 
<EM>PGP</EM> $B$rE,@Z$K@_Dj$7$F!"8x3+80%U%!%$%k(B ($B8x3+80B+(B) $B$HHkL)80%U%!%$%k(B 
($BHkL)80B+(B) $B$rB8:_$5$;$F$*$+$J$/$F$O$J$j$^$;$s!#;vA0$K%3%^%s%I%i%$%s$+$i!"(B
PGP $B$,@53N$K=pL>$d0E9f2=$r9T$J$&$3$H$r3N<B$K$7$F$*$/$N$,$h$$$G$7$g$&!#(B
<P><EM>Unix</EM> $BHG$GB8:_$9$k(B <EM>PGP</EM> $B$N%P!<%8%g%s$K$O(B <CODE>2.6.3(i)</CODE> $B$H(B 
<CODE>5.0(i)</CODE> $B$,$"$j!"$=$l$>$l=gHV$K!"(B<B>PGP2</B> $B$H(B <B>PGP5</B> $B$H8F$P$l$F$$$^$9!#(B
<B>GnuPG</B> $B$O?7$7$$0E9f%7%9%F%`$G$9!#:G6a$K$J$C$F3+H/$5$l$F$-$?$b$N$G$9$,!"(B
$B@h?JE*$J3+H/7ABV$N%*!<%W%s%=!<%9$G%U%j!<$G$"$j!"B?$/$NLL$K$*$$$F(B <B>PGP</B> 
$B$h$jM%$l$F$$$^$9(B (GnuPG mini howto 
<A HREF="http://www.dewinter.com/gnupg_howto">http://www.dewinter.com/gnupg_howto</A> $B$r$4Mw$/$@$5$$(B)$B!#(B
<P>$B$5$i$K(B <EM>PGP</EM> $B$,!"%"%a%j%+9g=09q$G3+H/$5$l$F$$$k%W%m%0%i%`$G$"$k$?$a!"(B
$B0E9f4XO"%3!<%I$r4^$`%W%m%0%i%`$K4X$9$kM"=P@)8B$NK!N'$K$R$C$+$+$k$H$$$&(B
$B$3$H$rL@$i$+$K$7$F$*$-$^$7$g$&(B $B!=(B $B$3$N$?$a$K!"$[$H$s$I$9$Y$F$N%P%$%J%j(B
$B%P!<%8%g%s$K9q:]HG$,B8:_$7$F$*$j!"$=$l$O!V(B<B>i</B>$B!W$H$$$&J8;z$G6hJL(B
$B$5$l$^$9(B (<B>pgp - pgpi</B>)$B!#(B
<P>
<H2><A NAME="ss5.1">5.1 PGP2</A>
</H2>

<P><EM>PGP2</EM> $B$O(B RSA 
<A HREF="http://www.rsa.com">http://www.rsa.com</A> $B%"%k%4%j%:%`$G80$r@8@.$7!"(BIDEA 
<A HREF="http://www.ascom.ch">http://www.ascom.ch</A> $B$r0E9f2=%"%k%4%j%:%`(B
$B$K;HMQ$7$^$9!#N>J}$H$b;HMQ$K@)Ls$N$"$k%"%k%4%j%:%`$G$"$j!"$=$l$>$l$NFC5v$K(B
$B$h$C$F;HMQ$,@)8B$5$l$F$$$^$9!#(B
($BLuCm(B: $B$3$N5-=R$K$D$$$F!">u67$,JQ$o$C$F$$$k$H$$$&;XE&$b$"$j$^$9(B)
<P>$B@5$7$/F0:n$5$;$k$?$a$K$O!"$=$l$r%$%s%9%H!<%k$7$F$*$-!"(B<CODE>~/.pgp</CODE>
$B$H$$$&%G%#%l%/%H%j$rMQ0U$7!"$=$NCf$K@_Dj%U%!%$%k(B <CODE>pgp-i.conf</CODE> $B$H!"HkL)80(B
$B$*$h$S8x3+80$N80B+%U%!%$%k$G$"$k(B <CODE>pubring.pgp</CODE> $B$*$h$S(B <CODE>secring.pgp</CODE>
$B$rF~$l$F$*$/I,MW$,$"$j$^$9!#(B
<P>
<H2><A NAME="ss5.2">5.2 PGP5</A>
</H2>

<P><EM>PGP5</EM> $B$K$h$C$F@8@.$5$l$k80$O(B <B>DSS/DH</B> (Digital Signature 
Standard / Diffie-Helman) $BJ}<0$G$9!#(BPGP5 $B$O(B <B>CAST</B> $B$H(B <B>Triple-DES</B>$B!"(B
$B$^$?(B <B>IDEA</B> $B$r0E9f2=%"%k%4%j%:%`$KMQ$$$^$9!#(BPGP5 $B$O(B <EM>RSA</EM> (PGP2) $B$G(B
$B=pL>$d0E9f2=$r$5$l$?%G!<%?$b07$&$3$H$,$G$-$^$9$7!"$=$N80(B ($B$D$^$j(B PGP2 $B$G(B
$B@8@.$5$l$?80$G$9!#(BPGP5 $B$O$=$N80$rB$$k$3$H$,$G$-$^$;$s$+$i(B) $B$r;H$C$F=pL>$d(B
$B0E9f2=$r9T$J$&$3$H$,$G$-$^$9!#$7$+$70lJ}!"(BPGP2 $B$O(B PGP5 $B$N(B <EM>DSS/DH</EM> 
$B$J80$r;H$($^$;$s(B $B!=(B $B$3$N$?$aHs8_49@-$NLdBj$,@8$8$F$$$^$9!#$J$<$J$i(B PGP2 $B$r(B 
<EM>Unix/Linux</EM> $B$G;HMQ$7B3$1$F$$$k?M$bB?$$$+$i$G$9!#(B
<P>PGP5 $B$,@5$7$/F0:n$9$k$h$&$K!"(B<CODE>~/.pgp</CODE> $B%G%#%l%/%H%j$K(B
$B8x3+80$HHkL)80$N80B+(B ($B$=$l$>$l(B <CODE>pubring.pkr</CODE> $B$^$?(B <CODE>secring.skr</CODE> $B$H(B
$B$J$j$^$9(B)$B!"$=$7$F@_Dj%U%!%$%k(B <CODE>pgp.cfg</CODE> $B$rCV$$$F$*$-$^$7$g$&!#(B
<P>$BN>J}$N%P!<%8%g%s$N(B <EM>PGP</EM> $B$r%$%s%9%H!<%k$7$F$"$k(B (PGP5 $B$NA0$K(B PGP2 $B$N(B
$B%$%s%9%H!<%k$H@_Dj$r$7$F$$$?(B) $B>l9g$K$O!"2<5-$N$h$&$K(B PGP5 $B$N@_Dj%U%!%$%k(B 
<CODE>~/.pgp/pgp.cfg</CODE> $B$r(B <CODE>~/.pgp/pgp-i.conf</CODE> $B$H$$$&(B
$B@_Dj%U%!%$%k$N%7%s%\%j%C%/%j%s%/$H$7$F:n@.$7$F!"(B
<P>
<BLOCKQUOTE><CODE>
~/.pgp$ ln -s pgp-i.conf pgp.cfg
</CODE></BLOCKQUOTE>
<P>$B$3$&$$$&9T$r(B <CODE>~/.pgp/pgp-i.conf</CODE> $B$H$$$&%U%!%$%k$N(B
$BKvHx$K2C$($^$7$g$&(B:
<P>
<BLOCKQUOTE><CODE>
<PRE>
PubRing = "~/.pgp/pubring.pkr"
SecRing = "~/.pgp/secring.skr"
RandSeed = "~/.pgp/randseed.bin"
</PRE>
</CODE></BLOCKQUOTE>
<P>$B0[$J$k%P!<%8%g%s$N80B+$N%U%!%$%k$O2?$NLdBj$b$J$/F10l%G%#%l%/%H%j$K(B
$B6&B8$9$k$3$H$,$G$-$k$N$G$9!#(B
<P>
<H2><A NAME="ss5.3">5.3 GnuPG</A>
</H2>

<P><B>GnuPG</B> $B$OA0=R$N$b$N$HF10l$N5!G=$r;}$D%W%m%0%i%`$G$9!#(B<EM>PGP</EM> $B$H$N(B
$B0c$$$O!"(B<EM>GnuPG</EM> $B$,FC5v$K$h$k@)8B$N$"$k%"%k%4%j%:%`$r;HMQ$7$J$$E@$G$9!#(B
<EM>PGP</EM> $B$O8D?ME*$J;HMQ$O<+M3$G$9$,!">&6HE*$J;E;v$O$=$N8B$j$G$O$"$j$^$;$s!#(B
$B$5$i$K3+H/$OHs8x3+$G$9!#(B<EM>GnuPG</EM> $B$O$$$+$J$k:n6H$G$N;HMQ$b<+M3$G$"$j!"(B
$B2f!9$NBg9%$-$J%*%Z%l!<%F%#%s%0%7%9%F%`$,$=$&$G$"$k$N$HF1MM!"%=!<%9$,8x3+(B
$B$5$l$F$$$^$9(B ($B$5$i$K!"$3$N<BAu$*$h$S3+H/$O<g$H$7$F(B <EM>Linux</EM> $B$K$*$$$F(B
$B$J$5$l$F$$$^$9(B)$B!#(B
<P><EM>GnuPG</EM> $B$K$h$C$F@8@.$5$l$?80$O(B <B>DSA/ElGamal</B> (<EM>Digital
Signature Algorithm</EM> $B$9$J$o$A(B <EM>DSS</EM>) $B$H$$$&<oN`$N$b$N$G$9!#$3$l$O(B
$B@)8B$N$"$kFC5v%"%k%4%j%:%`$G$"$k(B <EM>RSA</EM> $B$H(B <EM>IDEA</EM> $B$N;HMQ$r=|$1$P(B
$B40A4$K(B <EM>PGP</EM> $B$H8_49$7$F$$$^$9!#$H$O$$$(!"(BPGP2 $B$d(B PGP5 $B$HAj8_1?MQ$9$k$?$a$N$"$kDxEY$N8_49@-$b<B8=$9$k$3$H$,$G$-$^$9(B (GnuPG mini howto 
<A HREF="http://www.dewinter.com/gnupg_howto">http://www.dewinter.com/gnupg_howto</A> $B$r;2>H(B)$B!#(B
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