What is the effect of an avalanche? How can the avalanche effect be achieved using modern block ciphers?

What is the difference between a block cipher and a stream cipher? What is the difference between an unconditionally secure cipher and a computationally secure cipher?   What is the difference between a monoalphabetic cipher and a polyalphabetic cipher?  Why is it important to study Feistel ciphers?

4. Decipher the message ’uxahqomzpuqe’ using a Shift Cipher with k = 12. Show your work.

What is the "avalanche effect" in cryptographic algorithms, and why is it a desired property?

What are the potential limitations of Electronic Code Book (ECB)? If one ciphertext block is corrupted during the transmission, all subsequent ciphertext blocks cannot be decrypted unless until corrupted block is successfully retransmitted. Repetitive information contained in the plaintext may show in the ciphertext, if aligned with blocks. If the same message (e.g., an SSN) is encrypted (with the same key) and sent twice, their ciphertexts are the same. It needs an initialization vector to operate.

What is the genesis of avalanches? How can one generate the avalanche effect in the current block ciphers? Give an example to explain your idea.What is the genesis of avalanches? How can one generate the avalanche effect in the current block ciphers? Give an example to explain your idea.

The Feistel cipher design exactly what you'd expect it to be. How about a Feistel cipher-based contemporary block cipher?

Perform the Encryption and then the Decryption for the Hill Cipher where the Plain text: "POH" and the key is: "GYBNQKURP".

As one may have anticipated, the Feistel cypher design is, in fact, a cypher. It's worth looking at current block ciphers based on the Feistel network?

Where does snow fall to create an avalanche? When using preexisting block ciphers, how do you generate the avalanche effect? Justify your claims with examples.