Definition of "XOR"

XOR

/ˈɛks ˈɔɹ/

noun
plural XORs
1. (logic) The connective "exclusive or".
2. (electrical engineering) A logic gate that implements "exclusive or".
3. (programming) The symbolic representation that implements "exclusive or".
verb
third-person singular simple present XORs, present participle XORing, simple past and past participle XORed
1. (transitive, computing) To perform the XOR function upon.
  Quotations
  The XORed sequence has the same period as the sequence that is not XORed.
  1989, IEEE Communications Society, Conference Record
  XORing different constants into the four s-boxes in such a cipher has exactly the same effect as XORing a single constant into each round function output.
  1998, Stafford Tavares, Henk Meijer, Selected Areas in Cryptography
  There are weak keys in the sense that their use by foisting chosen plaintexts can be proved, which could be interesting for chip cards with a ‘burnt-in key’. First of all, however, these keys can be easily avoided—one only needs to XOR all subkeys with the hexadecimal number 0x0dae—and second, the probability that such a key can be caught is 2−96; that is about one out of 1029 randomly selected keys (this number even has a name: 100 quadrilliards).
  2007, Reinhard Wobst, “Life After DES: New Methods, New Attacks”, in Angelika Shafir, transl., Cryptology Unlocked, John Wiley & Sons, Ltd, section 3 (IDEA: A Special-Class Algoritmh), subsection 5 (Cryptanalyzing IDEA), page 239