.With the one-time-pad method, the key is combined with the plaintext in an XOR operation
. The result leads to a random sequence. The on-time pad, whose underlying encryption
method Lucifer was developed by IBM as early as 1974, is very costly because it requires an equal amount of keys as of transmitted data.
However, it is also very secure, since statistical analyses are not possible; provided that the keys are purely random and are only used once.