Answer Happy

You may search for literature online in order to answer the following questions. It is important that you cite your references in your answer. 1. What is a transposition cipher? Name three famous examples of transposition ciphers. (5 marks) 2. Describe the Rail Fence cipher mathematically. How can a given message be encrypted and decrypted? (8 marks) 3. Is this a strong or a weak cipher? Justify your answer. (2 marks) 4. Decipher the text below you can either try it by hand or write a short com- puter program) and encode your answer using a Rail Fence cipher with 3 rails. Document all your steps. Note that the spaces are part of the message and as such they matter. (15 marks) Ciphertext: xf ie ttorqw xnoxg seneos hhwu u hen irxat ttdfrsfe omxexomis m mhtfho ieo siyoxsx ag etaneghi stfa se t t wghxceto iefeih sneimthrino txrin peoreeon Alternatively you can try to decipher the following (same plaintext but without spaces): xreiotstxhhxommnffsdsseeeyxqwogtsfaaietierehrmoruxwixentgghep oiatiiueexonxciixhteeffsfewrhsnnertoxtsnhteoosomt togmenithnhoia