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4.7 Verschlüsselungsmodi

4.7

Verschlüsselungsmodi

Animation 4.7-1 demonstrates the different modes of operation.

You can choose between the 2 block ciphers DES (64 Bit block length / 64 Bit key length) and IDEA (64 Bit block length / 128 Bit key length).

The following modes of operation are implemented

  • ECB - Electronic Codebook Mode

  • CBC - Cipher Block Chaining Mode

  • CFB - Cipher Feedback Mode

  • OFB - Output Feedback Mode

Besides you have several possibilities to experiment with this applet.

  • The plaintext and both keys (sender and receiver) can be input in ASCII-Text.

  • In the modes CFB and OFB the shortened block length r can be changed.

  • In the modes CBC, CFB and OFB the Initialvector IV can be changed.

  • You can input transmission errors.

  • One block can be transmitted in a film sequence or step by step.

Animation 4.7-1: Verschlüsselungsmodi