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Decryption requires that the keys be applied in reverse order: P=Dk1[Ek1[P]] This results in a dramatic increase in cryptographic strength.The use of DES results in a mapping that is not equivalent to a single DES encryption.

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Q: Why is the middle portion of 3DES a decryption rather than an encryption?
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Can your middle name be part of your given name?

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Related questions

Which encryption algorithm is better and why?

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