April 2016
Intermediate to advanced
944 pages
27h 6m
German
Content preview from Kryptografie
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41 IPsec (Schicht 3)
Bei unserem Streifzug durch die OSI-Schichten kommen wir nun zu Schicht 3 (Vermittlungsschicht). Dort haben wir es in der Praxis meist mit IP (Internet Protocol) zu tun – dem Netzwerkprotokoll, das dem Internet seinen Namen gab. IP sah ursprünglich keine Kryptografie vor. Seit Ende der neunziger Jahre gibt es jedoch mit dem Standard IPsec eine entsprechende Erweiterung. IPsec wird innerhalb der IETF entwickelt und ist unter anderem ein fester Bestandteil der neuen IP-Generation IP Version 6 (IPv6).
Die Protokollnachrichten von IP werden IP-Pakete genannt. Jedes Paket enthält neben der Nutzlast einen Header und wird unabhängig ...
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