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1. $B0E9f5;=Q(B
1.1 $B6&DL800E9f7O(B
1.2 $B8x3+800E9f7O(B

2. $B%$%s%?!<%M%C%H$G$N0E9f2=(B
2.1 SSL
2.2 $BEE;R=pL>(B
2.3 $BEE;R%a!<%k$N0E9f2=(B

3. $BK\?MG'>Z(B
3.1 $BG'>ZJ}K!$NZ5;=Q$NFCD'(B
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1. $B0E9f5;=Q(B
1.1 $B6&DL800E9f7O(B    [$B0l>>(B80]
1.1.1 DES           [$B0l>>(B80]
1.1.2 IDEA          [$B7'C+(B99]
1.1.3 FEAL          [NTT$B%(%l%/%H%m%K%/%9(B]
1.1.4 $B%H%j%W%k(BDES   [$B7'C+(B99]
1.1.5 MISTY         [$B;0I)EE5!(B]
1.1.6 AES           [$B%;%3%`(B]
1.2 $B8x3+800E9f7O(B    [$B7'C+(B99]
1.2.1 RSA$BJ}<0(B       [$B7'C+(B99]
1.2.2 $B0lJ}8~@-4X?t(B  [$BB@ED(B95]

2. $B%$%s%?!<%M%C%H$G$N0E9f2=(B
2.1 SSL             [$B7'C+(B99]
2.1.1 $B%O%C%7%e4X?t(B  [$B7'C+(B99]
2.2 $BEE;R=pL>(B        [$B7'C+(B99]
2.3 $BEE;R%a!<%k$N0E9f2=(B
2.3.1 S/MIME        [$B7'C+(B99]
2.3.2 PGP           [$B7'C+(B99]
2.3.3 CA            [$B%;%3%`(B]

3. $BK\?MG'>Z(B         [$B%;%-(B00]
3.1 $BG'>ZJ}K!$NZ5;=Q$NFCD'(B  [$B%;%-(B00]
3.2.1 $BK\?M$N5-21$K$h$kJ}K!(B
3.2.1.1 $B%o%s%?%$%`%Q%9%o!<%I(B  [$B%;%-(B00]
3.2.1.2 $B%A%c%l%s%8!&%l%9%]%s%9J}<0(B [$B%;%3%`(B]
3.2.2 $BK\?M$N;}$AJ*$K$h$kJ}K!(B
3.3 $B%P%$%*%a%H%j%/%9(B
3.3.1 $B;XLfG'>Z(B      [$B;3ED(B00][$B%3%s%Q%C%/(B]
3.3.2 $BFz:LG'>Z(B      [$B2-EE5$(B]
3.3.3 $B@Z(B      [$B;3ED(B00]
3.3.4 $B@EL.LfG'>Z(B    [$BF|N)@=:n=j(B]
3.3.5 $B%5%$%sG'>Z(B    [$BF|K\%5%$%P!<%5%$%s(B]


$B!J2~%Z!<%8!K(B

$B;29MJ88%(B
[$B0l>>(B80] $B0l>>?.(B, $B0E9f$N?tM}(B, $B9VCL!&EOJU<#(B, $B>pJs%;%-%e%j%F%#$N2J3X(B, 
         $B9VCLO@>K\90G7!&>>K\JY(B, $B?M9);X$K$h$k;XLf$N56B$$N8&5f(B,
         $BEE;R>pJsDL?.3X2q5;=Q8&5fJs9p(B, Vol. 100, No. 213, ISEC2000-45,
         2000$BG/(B7$B7n(B25$BF|(B, $BEE;R>pJsDL?.3X2q(B, pp. 159-166.


$B;29M;29M(BWeb$B%5%$%H!!(B$B!JJL2hLL$K3+$-$^$9!K(B
[NTT$B%(%l%/%H%m%K%/%9(B] $B0E9f5;=Q(BFEAL, $B;2>HF|(B 2000-12-17,
        http://www.nel.co.jp/.
[$B2-EE5$(B] $BFz:LG'>Z%"%$%j%9%Q%9(B, $B;2>HF|(B 2000-12-10,
        http://www.oki.co.jp/OKI/Home/JIS/PROD/iris/default.html.
[$B%3%s%Q%C%/(B] $B;XLfG'>Z%7%9%F%`%F%/%K%+%k%[%o%$%H%Z!<%Q(B, $B;2>HF|(B 2000-12-10,
        http://www.compaq.co.jp/tec/whitepaper119.html.
[$B%;%3%`(B] CA$B!J(BCertificate Authority$B!(G'>Z6I!K(B, $B;2>HF|(B 2000-12-16,
        http://www.sisnet.or.jp/sis/dokuhon/index.html.
[$BF|K\%5%$%P!<%5%$%s(B] $B%5%$%sG'>Z(B, $B;2>HF|(B 2000-12-10,
        http://www.cybersign.co.jp/sign/about.html.
[$BF|N)@=:n=j(B] $B@EL.$K$h$kK\?MG'>Z(B, $B;2>HF|(B 2000-12-08,
        http://www.hitachi.co.jp/New/cnews/0009/0926c.html.
[$B;0I)EE5!(B] $B0E9f5;=Q(BMISTY, $B;2>HF|(B 2000-12-17,
        http://www.melco.co.jp/.












$B@>B<%<%_$N%Z!<%8(B $B$KLa$k(B




NISHIMURA, Kazuo (nishimura@komazawa-u.ac.jp)