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Authentication

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Authentication

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    1. ??? ???? Authentication

    2. ?? 5.1 ???????? 5.2 ????????? 5.3 Kerberos ?????? 5.4 ??X509????? 5.5 ???????????

    3. 5.1 ?????? 5.1.1??????? 5.1.2????????? 5.1.3??????? 5.1.4?????????

    4. ????????????? ???????(ID): uid,uid@domain DN: C=CN/S=Beijing /O=Tsinghua University/U=CS/ CN=Duan Haixin/Email=dhx@cernet.edu.cn ??????(??),??????????

    5. ????????????? ???????,??????????,??????????????

    6. ????????????? ???? ?????????? ???? ????(Single Sign-On) ???????????????????? ???????

    7. ????????? ???????(What you know ) ???????? ???????(What you have ) ?????????????????? ????????(What you are) ??,??,??,??,??,???,?? ?????????

    8. ????????? ???(Claimant) ???(Verifier) ????AI(Authentication Information) ?????(Trusted Third Party)

    9. ?????????/?? ?????? ??/???? ???????(OTP) Kerberos?? ??????????? ???????????

    10. ?? 5.1 ???????? 5.2 ????????? 5.3 Kerberos ?????? 5.4 ??X509????? 5.5 ???????????

    11. 5.2 ????????? 5.2.1??/???? (Challenge/Response) 5.2.2 ?????(OTP) 5.2.3 ?????

    12. ??/??????(CHAP) Challenge and Response Handshake Protocol Client?Server??????

    13. ???????(OTP) S/Key SecurID

    14. ???? ???? ????“?????”????,?????? ???????: ????????????; ???????; ???????????????????? ???????: ???????? ???? ??????

    15. ???? ?????: ????????; ?ID??; ???????; ???; ???????? ????????????,?????????, ???????? ???????????????????????????????????: ??????????:????? ????????????:?????

    16. ???? ????? ???????????,??????????????????? ????? ????????????????? ???????5?10???,??????????????? ?????? ?????????????

    17. ?? 5.1 ???????? 5.2 ????????? 5.3 Kerberos ?????? 5.4 ??X509????? 5.5 ???????????

    18. 5.3 Kerberos ???? 4.3.1 Kerberos ?? 4.3.2 Kerberos V4 4.3.3 Kerberos V5 4.3.4 Kerberos ??

    19. Kerberos ?? Kerberos ???????Athena ????????????? ????UNIX??????????????????: ??????,??????????? ???????????? ??????,?????????????? ??Needham-Schroeder????,????? ??????????,??????????????, ?????????

    20. Kerberos ?????? ????????? ??????????? Kerberos V4 Kerberos V5

    21. ????????? C?V????AS???,????KC,KV (1) C ?AS : IDc || Pc ||IDV (2) AS?C : Ticket (3) C ?V : IDc || Ticket Ticket=EKv(IDc|| ADc || IDv)

    22. ???????????

    23. ???? ??????(Ticket Granting Service) ??(Ticket) ????????,?tgs ? ?????????? TGS ?? ???? ??:

    24. ???????????(Cont.) ???:??????tickettgs???? ????,????????? ????,?????????? ???: ?????????? ???? ????????(Session Key)

    25. Kerberos V4 ?????

    26. Kerberos V4 ?????

    27. Kerberos V4 ?????(2) 2. TGS????,??????Ticketv (3)???????????,????????????,???Tickettgs ??????????????????????TGS C ? TGS : IDV || Tickettgs || Authenticatorc Authenticatorc = EKc,tgs[IDc||ADc||TS3] Tickettgs = EKtgs[Kc,tgs|| IDC|| ADC|| IDtgs || TS2 || Lifetime2] (4) TGS???????????,????,??????????Ticket v TGS ? C : EKc,tgs[Kc,v || IDV || TS4 || Ticketv] Ticketv = EK v[ Kc,v||IDC||ADC|| IDv||TS4||Lifetime4]

    28. Kerberos V4 ?????(3) 3. ???/???????:???? (5)??????????????? C ?V : Ticketv || Authenticatorc Ticketv = EK v [Kc,v||IDc||ADc||IDv||TS4||Lifetime4] Authenticatorc = EKc,v[IDc||ADc||TS5] (6)???????Ticketv????????,?????????????????,?????????? V ?C : EKc,v [TS5+1]

    29. ??????????

    30. ??????????

    31. Kerberos Version 5 ??version 4 ????? ???????: ????DES Internet?????: ????IP ?????? Ticket???? Authentication forwarding Inter-realm authentication ???Kerberos V4??? ??????? CBC-DES??????PCBC???? ???????????? ????????????

    32. Kerberos ??? ?????????? ?????? ?????????,????????????

    33. ?? 4.1 ???????? 4.2 ????????? 4.3 Kerberos ?????? 4.4 ??X509????? 4.5 ???????????

    34. 5.4 ??X509??????? 5.4.1 X509 ???? 5.4.2 X509?? 5.4.3 ??????????? 5.4.4 ????????

    35. X509 ???? Certificate Authority ???? Registry Authority ?????????? Directory ?????????? ??????? ???? ???????? ????????

    36. ?????

    37. ????? ???? CA<<A>> = CA {V,SN, AI, CA, TA, A, Ap} Y<<A>> ?? ??????Y ????X??? Y{I} ??Y ?I ???,?I ??Y??????????? ?????? ????CA??????????????? ??CA??,?????????????

    38. ????? ????(One-Way Authentication)

    39. ????? ????(Two-Way Authentication)

    40. ????? ????(Three-Way Authentication)

    41. ???????? ??A ??????X2???,?????B??? X2<<B>>???? CA??????? A??B?????: X2<<B>> , X1<<X2>>

    42. ?? 5.1 ???????? 5.2 ????????? 5.3 Kerberos ?????? 5.4 ??X509????? 5.5 ???????????

    43. 5.5.1 ?????? ????????????? ??,???,??,???????????????? ?? ??????????????????; ????????????????????:????,????; ????? ?????,??,????; ?????????? ; ?????(????,?????)?????????

    44. ??????(?) ????? ??????????????????; ???? ????????????????????; ?????????,??,??,??,??????; ???? ???????????,????????????????,??????????????? ???? ??????????,??,??,????????

    45. ??????(?) ???? ???????????????; ??????

    46. 5.5.2 ?????????????? ?????:?????(FRR)? ?????:?????(FAR)? ?????(CER):FRR=FAR???? CER???????????

    47. ?? ??????? ??/?????? Kerberos ???? X509?????????

    48. ?? ???????????????,?????? ?DES,RSA??????????/????????? Server/Client??????: DES: Client ?Server??????Kc RSA: ????KU, ???? KR Client : ( KUc , KRc ) , Server: ( KUs , KRs) Client ??KUs, Server ?? KUc

    49. ?? ?????????????,???Kerberos ?X509??????????????????,????????? ????????????????? ????? ??????????

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