Homework: One-time pad

A one-time pad is a cryptosystem invented by Vernam, it's a very simple system and is unbreakable if used correctly. To use a one-time pad, you need 2 copies of the "pad" which is a block of random data equal in length to the message you wish to encode. One-time pads are used in pairs, one copy of the pad is kept by each user, and pads must be exchanged via a secure channel( like a blue ray disk, dvd, or something like that). The pad is used by a using XOR every bit of the pad with every bit of the original message.

Once the message is encoded with the pad, the pad is destroyed and the encoded message is sent. On the recipient's side the encoded message you have to use XOR with the duplicate copy of the pad and the plaintext message is generated.

Now will see my code on python:

I read this page, it's interesting because inside explain this type of encryptation and if it is possible to break.

http://www.ranum.com/security/computer_security/papers/otp-faq/