What type of cipher relies on changing the location of characters within a message to achieve confidentiality?Stream CipherTransposition CipherBlock CipherSubstitution Cipher

Which encryption method involves rearranging the characters of the plaintext?HashingSubstitutionTranspositionSymmetric-key encryption

Alice and Bob want to communicate securely over an insecure channel where Evecould be listening. To ensure their message remains confidential, they decide to usea simple substitution cipher for encryption and decryption, where each letter in thealphabet is shifted by a fixed number of places.For this exercise, use a shift of 3 places to the right (a Caesar Cipher). For example,'A' becomes 'D', 'B' becomes 'E', 'Z' becomes 'C', and so on. Spaces and punctuationare not encoded; they remain unchanged.Alice wants to send the following message to Bob: "HELLO WORLD".a. Encrypt Alice's message using the specified shift. Provide the encrypted text.………………………………………………………………………………………………[1]b. Discuss the security of using the Caesar Cipher for encrypting messages.Consider scenarios where Eve knows or does not know the method ofencryption.……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………[1]

Which of the following below describe transposition correctly?Select one:a.Method by which symbols in the plaintext are moved into different positions in the ciphertextb.Message symbols are mixed up with many other symbols   c.Method by which symbols in the plaintext are replaced with different symbolsd.Method by which additional symbols are placed in the ciphertext

Which of the following encryption algorithms swaps adjacent characters?a.substitutionb.expansionc.transpositiond.compaction

Which algorithm operates on fixed-length groups of bits, providing security by scrambling the bits using a pseudo-random series of round functions?Stream cipherBlock cipherHash functionPublic key encryption