What is DES with Independent Subkeys

What is DES with Independent Subkeys?

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The DES algorithm derives sixteen 48-bit subkeys, for employ in each of the 16 rounds, from the 56-bit secret key supplied by user. It is interesting to consider effect of using the 768-bit key (separated in 16 48-bit subkeys) in place of the 16 related 48-bit keys which are generated through the key schedule in DES algorithm.

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