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Why is the middle portion of 3des a decryption rather than an encryption?
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25 votes
Why is the middle portion of 3des a decryption rather than an encryption?

User Libin Thomas
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11 votes
11 votes

Answer:

There is no cryptographic significance to the use of decryption for the second stage. Its only advantage is that it allows users of 3DES to decrypt data encrypted by users of the older single DES by repeating the key.

User Sophocles
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