Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Tichipiwa 6-bit input, 4-bit output inowanikwa nokusarudza mutsara uchishandisa kunze maviri bits (yokutanga uye yokupedzisira bits), uye mbiru uchishandisa yomukati mana bits. Somuenzaniso, chiyamuro "011011" chine mabhiti ekunze "01" uye mabhiti emukati "1101"; chibuda chinoenderana chaizova "1001". Mabhokisi masere eS DES aive nyaya yekudzidza kwakasimba kwemakore mazhinji kubva mukushushikana kuti musuwo wekumashure <unk> kusagadzikana kunozivikanwa chete kune vagadziri vayo <unk> kungave kwakasimwa mu cipher. The S-bhokisi magadzirirwo zvinodiwa pakupedzisira rakabudiswa (muna Coppersmith 1994) pashure paruzhinji rediscovery pamusoro differential cryptanalysis, achiratidza kuti vakanga nokungwarira tuned kuwedzera kuramba pamusoro ichi kurwisa zvakananga. Biham naShamir vakawana kuti kunyange kuchinja kuduku kuS-bhokisi kunogona kuderedza DES zvikuru. Pakave nekutsvakurudza kukuru mukugadzirwa kweS-bhokisi rakanaka, uye zvakawanda zvinonzwisiswa pamusoro pekushandiswa kwavo mumabhokisi ciphers kupfuura apo DES yakabudiswa. Chero S-bhokisi apo imwe neimwe inobuda bit inogadzirwa nebasa rakapetwa remabiti ekupinda, uye apo chero kusanganiswa kwakananga kwemabiti ekubuda zvakare ibasa rakapetwa remabiti ekupinda, iri S-bhokisi rakakwana.  Mubvunzo: Unowana sei kubuda kwe4-bit?
kusarudzwa mutsetse uchishandisa yokunze maviri matomu (yokutanga uye yokupedzisira matomu), uye mbiru uchishandisa yomukati mana matomu