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tema 3. criptografía simétrica: cifrado en bloque - CryptULL

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2 #<br />

8 ! :<br />

b’ 0<br />

b’ 1<br />

b’ 2<br />

b’ 3<br />

b’ 4<br />

b’ 5<br />

b’ 6<br />

b’ 7<br />

1 0 0 0 1 1 1 1<br />

1 1 0 0 0 1 1 1<br />

1 1 1 0 0 0 1 1<br />

= 1 1 1 1 0 0 0 1 +<br />

1 1 1 1 1 0 0 0<br />

0 1 1 1 1 1 0 0<br />

0 0 1 1 1 1 1 0<br />

0 0 0 1 1 1 1 1<br />

Análisis de riesgos 28<br />

b 0<br />

b 1<br />

b2 b3 b 4<br />

b 5<br />

b 6<br />

b 7<br />

Es el inverso del<br />

valor de <strong>en</strong>trada<br />

1<br />

1<br />

0<br />

0<br />

0<br />

1<br />

1<br />

0<br />

Valor {63} 16 o<br />

{011000011} 2<br />

7

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