The two problems are; 1. The One time pad needs to be truly random. Pseudo random generators are quick however they can be predicted.
The second is practicability of being able to transmit the number of keys securely to the receiver.
For every bit of plain text, there is also 1bit of key.
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Pad printing can be described as a process where two dimensional images are transferred on three dimensional objects. Pad printing is used on golf balls and keyboards.
Compound words using 'one' are onesided (argument), onedimensional (flat), onetime (as a modifier).
A one-time pad is an encryption/deencryption method where a random series of cipher codes is used one time, and one time only, in a communication. Assuming that only the two parties possess their pairs of pads, then the encryption is unbreakable.
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The answer you get when you multiply two numbers together.