Explanation:Even if the message is intercepted by an enemy, the enemy, not knowing the key, will not be able to decrypt and understand the message. 3. Which of the following is not a property of good encryption technique ?
A. Relatively simple for authorized users to encrypt and decrypt data
B. Decryption key is extremely difficult for an intruder to determine
C. Encryption depends on a parameter of the algorithm called the encryption key
D. None of the mentioned
Answer:A
Explanation:Even if the message is intercepted by an enemy, the enemy, not knowing the key, will not be able to decrypt and understand the message. 3. Which of the following is not a property of good encryption technique ?
A. Relatively simple for authorized users to encrypt and decrypt data B. Decryption key is extremely difficult for an intruder to determine C. Encryption depends on a parameter of the algorithm called the encryption key D. None of the mentioned
Explanation:Here a,b and c are the properties have to be present in a good design of a encryption technique. 4. In which of the following encryption key is used to encrypt and decrypt the data ?