1 199 : . : . : . . 200 : . .2 201 : ( ) . MAC ( ) . . .. - email 202Man in the middle attack . . . .. C 3 203 HTTPS - TLS 204Transport Layer Security - TLS Internet. Secure Sockets Layer SSL . , , .4 205Transport Layer Security - TLS . . / / TLS . 206Transport Layer Security - TLS TLS . browser. . TLS server browser . .5 207Transport Layer Security - TLS TLS URL https:// http:// http ( 443). browser . : (Handshake Protocol) (Record Protocol) 208 (Handshake Protocol) ( ) . : . .6 209 : hello : , . . . . . (Handshake Protocol) 210ClientServerClientHello--------> ServerHelloCertificate*ServerKeyExchange*CertificateRequest*

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