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1
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????????????????????????????????(???)??????
? ? ?
?????????
??????????
????
2
??????
???????????
????? ???????????????????
????? ????????????????????? ??????? ????????????
????? ???????????????????????????????
??????? ?????
??????? ??????
A????
A????
A
B
A????
B????
B????
B????
3
???????????????
M.T.
4
???????????????????????????
IPSEC(Security Architecture for Internet
Protocol) ?????????????????????????????????????
???
TLS(Transport Layer Security) ????????????(?????
??)???????????? SSL(Secure Socket
Layer)??????????????
S/MIME(Secure Multipurpose Internet Mail
Extension) ???????????????????????
5
???????????????????????????
???????????
?????????????????????????? (?)IPSEC??????????????
??????????????,??????(????)?????????????
?????????
S/MIME
??????
TLS/SSL
TCP?(????????)
IP?(???????)
IPSEC
?? OSI?????
6
IPSEC
IP?(???????)
IPSEC
I P ?????????????????? ????????????????????????
??????
IPSEC??? ??1 ??????????
7
IPSEC
IPSEC???????????
IPSEC ????3???????
ESP(Encapsulating Security Payload???????)
IKE
AH
IPSEC?,????????????????????????(??), ??????ESP????
???? ESP?????2???????? ???????
IP???????????? ?????????? ???????????(?????)
????????
???IP???????????????????????????
??IP???
IP???
?? ???
?????
IP???
IP???
?????
?? ???
8
IPSEC
IPSEC?????
???????,?????????????
IPSEC??? ??2 ????
IPSEC
ESP
AH(Authentication Header?????)
IKE
9
IPSEC
IPSEC?????
IP???
???
?????
????????
????????
??????
????
?????????????
????????????
?????
???????? ?????????????????? ??????????????
??? ?????????????????????????????
(??????????????????????????) ?????????????????
?????????????
???????????? ?????????????????????????????
???????IP???????????
10
TLS(SSL)
??????
TLS/SSL
TCP?(????????)
??????????????????????????????? (??????????? SSL
1.0 ? SSL 2.0 ? SSL 3.0 ? TLS 1.0) Netscape????,
??????????????? ?????????,????????????????????
?????TLS/SSL?????? ????????, ????? ?????????????
????????
11
TLS(SSL)
TLS??????
TLS??,????????????????????????????? ?????????
???????????????????? ????????????/???????????
??????
TLS????2??????? ?????????? ??????????????????
??????????????????? ?????????????
???????????????,??????????? ??????????????????
? ??????????????????,???????????? ??????
12
S/MIME
?????????
S/MIME
S/MIME????????????????,??????????? ???????????
????? ?????????????????????????
???????????? ???????????????????????
????????????????,?????????????
?? ??????????,?????????????????
???????????????
13
S/MIME
??????????????
?????(????) ?????????????,???????,????????????
????????,?????,??????????(???????
????????????????????)??????? ?????(????)
???????????????????,?????,??????? ????????
????????????????? ????????????????,??????????????
?? ???????
14
S/MIME
S/MIME?????????
?????????????????????????? ?(??)????????
???,??????,?????????,
???????????????ON,OFF??
??????,??????????????????? ???????????????????
????????????? ??,?????????????????????????????? ??
?????????
15
---
  • ---

16
OSI?????
?1?(???) ??????????????????????????????????????
??????????????1???????? ?2?(???????)
?????????????????,???????????????????????
?3?(???????) ??????????????????????,??????????(?
?)???????? ?4?(????????) ??????????????????????
?????????,??????????? ?5?(??????)
??????????????????????????????(??????)???????????
?6?(??????????) ?5??????????????????????????????
,?7?????????????????????????????? ?7?(?????????)
?????????????????????????????????? ??
17
???????
?????? ???????????????????????????????????????????
???????????????????????????????????????? ?????????
??????????????????????????????????????????????????
??????????????????????????????????????????????????
???? ??
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