Fortgeschrittener Verschlüsselungsstandard(AES)

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Das National Institute of Standards and Technology (NIST) entwickelt in Zusammenarbeit mit Industrie-Unternehmen seit Jahren den Verschlüsselungsstandard Advanced EncryptionStandard (AES). Diese symmetrische Verschlüsselung soll dieDES-Verschlüsselung ablösen. Die AES-Verschlüsselung spezifiziert drei verschiedene Schlüssellängen mit 128, 192 und 256 Bit. Das bedeutet im Falle des 128 Bit langen Schlüssels 3,4 x 10exp38 Möglichkeiten, bei dem 192 Bit langen Schlüssel gibt es 6,2 x 10exp57 Möglichkeiten und beim 256-Bit-Schlüssel sogar 1,1 x 10exp77 Möglichkeiten. Zum Vergleich bietet der 56 Bit lange DES-Schlüssel 7,2 x 10exp16 Möglichkeiten.

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