3.7 - Understand Methods of Cryptanalytic Attacks CISSP Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What information can a timing attack leak from a cryptographic operation?

   • AInformation about secret keys or plaintext based on the time taken to perform the operation
   • BThe network bandwidth of the connection
   • CThe physical location of the server
   • DThe encryption algorithm used
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A security researcher is analyzing a proprietary encryption algorithm. The researcher has a set of plaintext messages and their corresponding ciphertexts. Which attack is most appropriate to attempt to recover the key?

   • ATiming attack, measuring the time of encryption operations
   • BCiphertext-only attack, using only the ciphertexts
   • CChosen-ciphertext attack, but the researcher does not have a decryption oracle
   • DKnown-plaintext attack, using the plaintext-ciphertext pairs to analyze the algorithm
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   Which of the following is an example of an implementation attack?

   • AKnown-plaintext attack
   • BTiming attack
   • CBrute force attack
   • DFrequency analysis
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   How does a known-plaintext attack help an attacker decrypt other messages?

   • ABy using the known plaintext-ciphertext pair to derive the key or exploit patterns to decrypt other ciphertexts
   • BBy intercepting the key during transmission
   • CBy using a rainbow table to reverse the ciphertext
   • DBy guessing the plaintext of other messages based on common phrases
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   In a pass the hash attack, what does the attacker use to authenticate without knowing the plaintext password?

   • AA certificate from a compromised CA
   • BThe plaintext password
   • CA forged Kerberos ticket
   • DThe captured password hash
   Reveal Solution Discussion Select an answer first