Opposite operation of XOR

a='01101010'

key='10010010'

Cipher=xor(a,key)= 11111000

now how to get 'a' back if i have key & Cipher?

[aaru sri]

wht func is used as a reverse of bitxor

[Guillaume]

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.

Answer 1

[James Tursa]

a = xor(Cipher,key)

[Alina]

its quit simple