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TI : chun m ha th tn in t S/MIME

GVHD:Nguyn Th Thu Thy SVTH: V Vn QunPhan Quc TunNguyn Quc Trung1Gii thiuS/MIMETng quan v MIME2Gii thiu S/MIMEI. Gii thiu3I. Gii thiuNgy nay, mng Internet tr thnh nn tng chnh cho s trao i thng tin trn ton cu. Nh Internet m vic trao i thng tin cng ngy cng tin li, nhanh chng hn. Tuy nhin trn mi trng truyn thng ny, ngoi mt tch cc Internet cng tim n nhng tiu cc ca n i vi vn bo v thng tin. C nhiu phng php bo v thng tin trn ng truyn nh : s dng mt khu (password), m ha d liu, hay steganography (giu s tn ti ca d liu) Cng vi s pht trin ca cc bin php bo mt ngy cng phc tp, th cc hnh thc tn cng ngy cng tinh vi hn. Do vn l lm sao a ra mt gii php thch hp v c hiu qu theo thi gian v s pht trin mnh m ca khoa hc k thut.C hai phng php s dng c ch mt m kha bt i xng. PGP v S/MIME. C hai phng php ny u cho php ch k s v m ha ni dung emailS/MIME c s dng choMicrosoftOutlook v mt s email client khc, nhng trc khi s dng S/MIME, bn phi c c chng ch S/MIME do mt cng ty th ba cung cp. Trong khun kh ca bn tiu lun ny, s i su vo trnh by v c ch S/MIME s dng trong k v m ha th in t.

44II. Tng quan v mime5II. Tng quan v MIME Tiu chun Multipurpose Internet Mail Extensions (MIME) Giao thc m rng th in t Internet a mc ch l mt tiu chun do Nhm chuyn trch k thut Internet - Internet Engineering Task Force (IETF) pht hnh di dng RFC.MIME cho php m rng nh dng th in t nhm h tr cc thng ip dng vn bn, cc nh dng m rng cho thng ip phi vn bn, thng tin6II. Tng quan v MIMETiu chun MIME ln u c cng b vo thng 08/1982 (RFC 822), cc phin bn tip theo ca MIME ln lt c cng b trongRFC 1341(06/1992) C ch xc nh v m t nh dng cc ni dung ca thng ip Internet B baRFC 1521,RFC 1522,RFC 1590cng b 09/1993, thay th RFC 1341 v b sung mt s m rng cho MIME. Phin bn hin thi ca MIME c s dng rng ri v thay th RFC 1521, RFC 1522, RFC 1590 l 06 RFC7II. Tng quan v MIMEMIME xc nh cc c ch truyn ti cho cc kiuthng tintrong th in t. Cc kiu thng tin ny bao gm vn bn thng thng (ngoi tr vn bn s dng b k t ASCII), cc ni dung dng 8-bit nh hnh nh, m thanh, video v cc chng trnh my tnhMt s c im v c ch truyn ti thng ip MIME bao gm:Nhng trng Header MIMETrng header MIME-VersionTrng Header Content-TypeContent-Type DefaultTrng Header Content-Transfer-EncodingTrng Content-IDTrng header Content-DescriptionCc trng header MIME ph

8c im ca MIMEII. Tng quan v s/mime9II. Tng quan v S/MIME S/MIME ( Secure/Multipurpose Internet Mail Extensions) L 1 chun internet v nh dng cho email. Hu nh mi email trn internet u c truyn qua giao thc SMTP theo nh dnh MIME S/MIME a ra 2 phng php an ninh cho email : M ha v chng thc. C 2 cch u da trn m ha bt i xng v PKI

10II. Tng quan v S/MIMELch s pht trinS/MIME ln u tin c gii thiu vo nm 1995 bi RSA Data SecurityS/MIME phin bn 2 c IETF cng b vo nm 1998 ,v n c chp nhn mt cch rng ri t nn cng nghip th in t trn InternetS/MIME phin bn 3 c pht trin bi IETF S/MIME Working Group v c chp nhn l chun ca IETF vo thng 7 nm 1999

11II. Tng quan v S/MIME Cc tnh nng ca 1 webmail client h tr S/MIME : To ra 1 ch k s cho 1email gi i m bo ngi nhn mail tin rng khng c s can thip v n c n t ngi g mong mun M ha 1 email gi i ngn chn bt c ai xem, thay i.. Ni dung ca email trc khi n vi ngi nhn.Xc minh ch k s ca 1 email k n vi 1 qu trnh lin quan n 1 danh sch thu hi chng ch (CRL)T ng gii m 1email gi n ngi nhn c th c c ni dung ca email.Trao i ch k hoc email c m ha vi nhng ngi dng khc ca S/MIME

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Tin trnh ca S/MIMEII. Tng quan v S/MIME

14Qu trnh xc minh ch k sII. Tng quan v S/MIME15Qu trnh bo v E-mail bngS/MIME bn gi

II. Tng quan v S/MIME16Qu trnh bo v E-mail bngS/MIME bn nhn

II. Tng quan v S/MIME17

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II. Tng quan v S/MIME19

Iii. Demo20Thank You !21