Answer the following question: What is the average block size when using a block cipher?

How do stream ciphers differ from block ciphers? give 3 differences and explain the answer?

Many symmetric block ciphers use a similar structure as the Feistel Cipher. Briefly explain the structure and operations of the Feistel cipher.

How may block and stream ciphers exchange keys, and why should they be different?

Run my function on {(1,4),(0,6),(3,5),(2,9),(7,8)}. Is the output what you expect? Find the problem and fix it, writing a correct version of the function. Again, use the same function name, i.e., count_crossings_and_nestings. Demonstrate that the new version works by testing it on the example provided. Now write a well-documented version of your function count_crossings_and_nestings. Add a document string and plenty of comments.

Why is it not desirable to reuse a stream cipher key?

Explain the significance of the Caesar cipher in the history of encryption.

How does a block cipher differ from a stream cipher?

How may block and stream ciphers exchange keys, and why should they be different?

How may block and stream ciphers exchange keys, and why should they be different?

Explain what the following lines of code do pad = len(byteblock)%16 * (-1)byteblock_trimmed = byteblock[64:pad]ciphertext = cipher.encrypt(byteblock_trimmed)ciphertext = byteblock[0:64] + ciphertext + byteblock[pad:]

In RSA encryption, if the public key is 299, what is the private key? (Enter your answers as a comma-separated list.)

Why is hashing better than encrypting passwords for file storage?