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Symmetric cipher

Quiz by Anitha Cruz PSGRKCW

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6 questions
Show answers
  • Q1
    What is a symmetric cipher?
    A cipher that uses a public and private key for encryption and decryption
    A cipher that only encrypts but does not decrypt messages
    A cipher that uses different keys for encryption and decryption
    A cipher that uses the same key for encryption and decryption
    30s
  • Q2
    What is a key in a symmetric cipher?
    The plaintext message being encrypted or decrypted.
    The output of the encryption or decryption process.
    The algorithm used to encrypt or decrypt data.
    A value used by the cipher algorithm to encrypt and decrypt data.
    30s
  • Q3
    Which of the following is an advantage of using a symmetric cipher?
    It can be used to encrypt data over long distances.
    It provides stronger security than asymmetric encryption.
    It can be used without a shared secret key between the sender and receiver.
    It is generally faster and requires less processing power than asymmetric encryption.
    30s
  • Q4
    Which of the following is a weakness of symmetric ciphers?
    Symmetric ciphers are generally slower than asymmetric encryption.
    Key distribution is a challenge, since the same key must be shared between the sender and receiver.
    Symmetric ciphers are vulnerable to brute-force attacks because they use a fixed-length key.
    Symmetric ciphers are ineffective against quantum computing attacks.
    30s
  • Q5
    What is a substitution cipher?
    An encryption technique that rearranges the order of the bits in the plaintext.
    An encryption technique that generates a random set of bits to XOR with the plaintext.
    An encryption technique that adds a random set of bits to the plaintext.
    An encryption technique that replaces each letter in the plaintext with a different letter or symbol.
    30s
  • Q6
    What is the difference between encryption and decryption?
    Encryption is the process of compressing data, while decryption is the process of decompressing it.
    Encryption is the process of converting ciphertext into plaintext, while decryption is the process of converting plaintext into ciphertext.
    Encryption is the process of converting plaintext into ciphertext, while decryption is the process of converting ciphertext back into plaintext.
    Encryption and decryption are the same process, but in reverse order.
    30s

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