Computer Networks MCQs

1018 MCQs  (Page 41 of 102)

Which of the following is an advantage of symmetric cipher?
A. (n(n-1))/2 keys are required for n people
B. Sharing secret key over communication channel
C. Brute force attack for small key size
D. Quick encryption and decryption
Which of the following is incorrect about symmetric key cryptography?
A. It uses common key for both encryption and decryption
B. It is a secret key cryptography
C. It uses single fixed length key for each algorithm
D. Symmetric key can be combined with asymmetric key to achieve more security
Which of the following is a disadvantage of symmetric cipher?
A. Quick encryption
B. Less computational power
C. High level of security
D. Transmission of secret key
Which of the following is not an application of symmetric encryption algorithms.
A. Data security
B. Cloud storage
C. User privacy
D. Bitcoin’s block chain
What are the two keys that are used in asymmetric key cryptography?
A. Secret key and private key
B. Private key and public key
C. Public key and secured key
D. Secured key and private key
Who are three discoverers of the RSA algorithm in public key cryptography?
A. Rivest, shamir, aldleman
B. Routest, shamir, adem
C. Robert, shamuel, alice
D. Radmir, shadhur, alice
What is the first public key cryptography algorithm?
A. Rsa algorithm
B. Aes algorithm
C. 3des algorithm
D. Knapsack algorithm
Which of the following is not a property of public key cryptography?
A. Uses different keys
B. Every user has a unique private key
C. Public key can be same for number of users
D. Cannot deduce private key from public key
What are the types in schemes of public key encryption?
A. Rsa, eigamal, elliptic curve cryptography
B. Elliptic curve, rsa
C. Rsa, eigamal
D. Eigmal, rsa