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Cyber Crime Investigation

Classical Encryption Techniques

Question $1$:

Apply the principles of the Caesar cipher to encrypt a message "Hello World" Discuss the strengths and weaknesses of the Caesar cipher. Additionally, propose a scenario where the Caesar cipher might be an effective choice for securing communication and explain your reasoning.

Question $2$:

Explore the Playfair cipher by encrypting and decrypting a short text "Hello World" Discuss the key features of the Playfair cipher that differentiate it from other classical encryption methods. Provide a real$-$world example where the Playfair cipher could be applied for secure communication.

Question $3$:

Implement the Hill cipher to encrypt a message "Hello World" considering the matrix operations involved in the encryption process. Discuss the advantages and limitations of the Hill cipher in comparison to other classical encryption methods like the Caesar and Playfair ciphers. Propose

a scenario where the Hill cipher might be preferable over other classical encryption techniques for protecting sensitive information.