Definitions for "One Time Pad"
A system of encryption where the key is the same length as the message to be encrypted, and never repeats. For example, COMPUTER could be encrypted as AAAAAAAA or CUCUMBER, depending on the key used. This is the only totally safe form of encryption proven mathematically.
A theoretically (and the only known) unbreakable method of encryption. It's most important property is that it is almost useless in real life. It needs a key, exactly the same length as the message to be encrypted, that may never be re-used, and that is completely and truly random, not generated by any algorithm. Any claim of one-time pad-equivalence or such is false by definition.
a cipher that cannot be broken