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XOR, often written ⊕, is one of the basic operations on bits and bit-sequences. It is a building block of many cryptographic primitives (and some higher-level algorithms, like modes of operations).
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Reversing Rotation + XOR
So in the end you will get something like
1010
1010
1010
So now you Apply XOR on these numbers which results in :
00001010
00010100 (XOR)
01010000 (XOR)
---------
01001110
So you end up getting …