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Opposite operation of XOR

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Alina
Alina 2014-3-7
评论： Guillaume 2018-10-19
a='01101010'
key='10010010'
Cipher=xor(a,key)= 11111000
now how to get 'a' back if i have key & Cipher?
  2 个评论
aaru sri
aaru sri 2018-10-19
wht func is used as a reverse of bitxor
Guillaume
Guillaume 2018-10-19
wht func is used as a reverse of bitxor
The reverse of any xor operation is itself, so the reverse of bitxor is bitxor. This is a fundamental property of xor, applying it twice gets you back where you started.

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回答（1 个）

James Tursa
James Tursa 2014-3-7
a = xor(Cipher,key)

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