DES S-Box

This is a discussion on DES S-Box within the Tech Board forums, part of the Community Boards category; Someone is able to explain in detail the construction and operation of the DES S-Box, which from n input bits ...

  1. #1
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    DES S-Box

    Someone is able to explain in detail the construction and operation of the DES S-Box, which from n input bits input, produces an output of m bits, with m <n?
    How can I get these properties?
    The process is reversible? How can I get the initial bits from those produced by the S-Box?

    Thanks in advance for your answers.

  2. #2
    Registered User meganewbie's Avatar
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    Already posted DES S-Box

    Cross Posted Properties of DES S-Box - C++ Forum

  3. #3
    a_capitalist_story
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    And here too

    Sigh.

  4. #4
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    Everybody speaks of the whole algorithm, but I need to know the process that allows to obtain an output, smaller than the input, which is reversible. I can't understand how it's possible.
    Please, help me.

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