Select the correct answer for eacf 1. Which one of these is faster? (a) Stream Cipher (b) Block Cipher (c) RSA (d) Steganography 2. Which type of cipher places "a message within a message"? (a) Transposition (b) Stream (c) Substitution (d) Concealment 3. Which of the following describes a n asymmetric key algorithm? (select two) (a) Does not require secure exchange of a secret key (h) Require two senarate keve Which of the following is the PRIMARY advantage of using secret key encryption systems compar public key systems? . (a) Fast encryption (b) Long keys (c) Easy key management (d) Implemented both in hardware and software thethe eicryption of each 8-by e block is independent of the others. (a) OFB mode (b) ECB mode (c) CBC mode (d) CFB mode Which of the following public key Hellman protocol? encryption and digital signature schemes is most similar to the Diffi (a) RSA signature (b) RSA encryption (c) ElGamal encryption Gmal cinnt