From Wiktionary, the free dictionary
2004 February 21, George Dance, “Monty Hall and pseudologic”, in sci.logic[1] (Usenet):Given the game as described, (P xor M xor R) is true (ie, its probability is one).
2004 March 18, Tom St Denis, “Security flaw in Streambuddy”, in sci.crypt[2]] (Usenet):The attack is that Z_i == out[i] So if we know the plaintext we know o[i] xor r[i].
