You want to build a hardware device to do block encryption in the cipher block chaining (CBC)

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You want to build a hardware device to do block encryption in the cipher block chaining (CBC) mode using an algorithm stronger than DES. 3DES is a good candidate. Figure 6.11 shows two possibilities, both of which follow from the definition of CBC.Which of the two would you choose:

a. For security?

b. For performance?image text in transcribed

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