Bit-wise inclusive-or of two bit-strings X and Y of the same bit length.
Sources:
NIST SP 800-20
The bitwise exclusive-OR of two bit strings X and Y of the same length.
Sources:
NIST SP 800-38A
under X⊕ Y
NIST SP 800-38B
NIST SP 800-38C
under X⊕ Y
NIST SP 800-38D
under X⊕ Y
The bitwise exclusive-OR of bit strings X and Y whose bit lengths are equal.
Sources:
NIST SP 800-38F
under X⊕ Y
Bitwise exclusive-or (also bitwise addition modulo 2) of two bitstrings
X and Y of the same length.
Sources:
NIST SP 800-90A Rev. 1