Paked - Why is middle portion of 3DES(data Encryption Standard) a decryption rather than an encryption?


Why is middle portion of 3DES(data Encryption Standard) a decryption rather than an encryption?

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.

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