April 2016
Intermediate to advanced
944 pages
27h 6m
German
Content preview from Kryptografie
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42 TLS und DTLS (Schicht 4)
Nachdem wir im letzten Kapitel das Schicht-3-Protokoll IPsec betrachtet haben, klettern wir nun im OSI-Modell um eine Etage nach oben. In Schicht 4 (Transportschicht) gibt es im Internet traditionell zwei Protokolle: das verbindungsorientierte TCP und das verbindungslose UDP. Wie alle frühen Internetprotokolle enthalten diese beiden in ihrer ursprünglichen Version keine Kryptografie. Mit dem kryptografischen Netzwerkprotokoll TLS (Transport Layer Security) und dessen kleinem Bruder DTLS (siehe Abschnitt 42.3) ist es jedoch möglich, diesen Mangel zu beheben.
Während IPsec in einem langwierigen Prozess innerhalb der IETF ...
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