ITCO 663 AIU Conventional Encryption Techniques Paper

There are two parts to this assignment. Part 1 involves the encryption/decryption scenario below and Part 2 requires research on the classification of ciphers, and popular algorithms.

Part 1

Use a two-stage transposition technique to encrypt the following message using the key “Decrypt”. Ignore the comma and the period in the message.

Message: “The Transposition cipher technique works by permuting the letters of the plaintext. It is not very secure, but it is great for learning about cryptography.”

In a 2–3 page summary, discuss the following:

Is it possible to decrypt the message with a different key? Justify your answer.

Do you agree with the statement of the message? Why or why not? Give at least two examples that support your view.

Part 2

Provide a 1–2-page researched responses to the following:

Research and provide a detailed meaning for at least three techniques in which encryption algorithms can produce ciphertext. Pick at least 3 from the cipher list below:

Monoialphabetic

Steganographic

Polyalphabetic

Polygraphic

Route transposition

Columnar Transposition

Synchronous Stream

Asynchronous Stream