Someone is able to explain to me the construction and operation of the DES S-Box, which from n input bits input, produces an output of m bits, with m <n?

I found some material, but I can't understand it:

http://it.wikipedia.org/wiki/S-Box

http://en.wikipedia.org/wiki/DES_supplementary_material

Thanks in advance for your answers.

I found some material, but I can't understand it:

http://it.wikipedia.org/wiki/S-Box

http://en.wikipedia.org/wiki/DES_supplementary_material

Thanks in advance for your answers.

Last edited on

Please don't create multiple threads. You already have one here:

http://www.cplusplus.com/forum/general/83489/

http://www.cplusplus.com/forum/general/83489/

Yes, but someone considered it cross posting, so I re-opened it in order to obtain some advice rather than unuseful messages.

The topic was not closed, someone just pointed out that you were spamming support sites with the same question. You can still use the same thread for discussion.

responding to original thread http://www.cplusplus.com/forum/general/83489/

Last edited on

If it isn't cross-posting, can someone remove "meganewbie" messages?

Then, can somebody explain me this part of the algorithm?

Thanks to all.

Then, can somebody explain me this part of the algorithm?

Thanks to all.

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