String XOR functions perform the bitwise xor operation on each of the corresponding pairs of characters in the two strings. The xor operation is often used in cryptography or computer science for the simple purpose of encryption or hashing.
In string XOR functions, each character of one string is xorred with the character of another string, resulting in a new string. The xOR operation offers a reversible transformation. This means that repeating the same xor operation on the result will return the original string. String XOR functions are often used in basic encryption or encodings where bitwise manipulations are performed on the character level.