Basic Cryptography & Public Key
Infrastructure Practice Exam Questions
Fully Solved.
What type of key is used for only one single key establishment process and is never stored in memory or
retained? - Answer Ephemeral Key
What type of cryptography derives its power from the fact that qubits can represent numerous possible
combinations of 1 and 0 at the same time? - Answer Quantum cryptography
What are common cryptography feature is an aspect of white-box cryptography where keys are
protected from extraction when under the control of the penetration tester or attacker? - Answer
Obfuscation
Which cryptographic service ensures that the original sender cannot deny sending data or engaging in a
digital transaction based on the usage of a secret or private key? - Answer Non-repudiation
Which of these cryptographic hashing algorithms should not be used in a new modern implementation?
- Answer MD5
Which of these versions of Diffie-Hellman is commonly used in TLS and uses elliptic-curve public/private
key pairs and forward secrecy? - Answer ECDHE
Match the type of certificate with its corresponding characteristic. - Answer Code signing certificate -
Authenticates the source and integrity of device drivers
Wildcard certificate - Used with multiple subdomains
Self-signed certificate - Signed by the entity it certifies, such as the root CA
Root certification - Trust anchor for digital certificates in the chain of trust
S/MIME certificate - Signs and encrypts email messages
Infrastructure Practice Exam Questions
Fully Solved.
What type of key is used for only one single key establishment process and is never stored in memory or
retained? - Answer Ephemeral Key
What type of cryptography derives its power from the fact that qubits can represent numerous possible
combinations of 1 and 0 at the same time? - Answer Quantum cryptography
What are common cryptography feature is an aspect of white-box cryptography where keys are
protected from extraction when under the control of the penetration tester or attacker? - Answer
Obfuscation
Which cryptographic service ensures that the original sender cannot deny sending data or engaging in a
digital transaction based on the usage of a secret or private key? - Answer Non-repudiation
Which of these cryptographic hashing algorithms should not be used in a new modern implementation?
- Answer MD5
Which of these versions of Diffie-Hellman is commonly used in TLS and uses elliptic-curve public/private
key pairs and forward secrecy? - Answer ECDHE
Match the type of certificate with its corresponding characteristic. - Answer Code signing certificate -
Authenticates the source and integrity of device drivers
Wildcard certificate - Used with multiple subdomains
Self-signed certificate - Signed by the entity it certifies, such as the root CA
Root certification - Trust anchor for digital certificates in the chain of trust
S/MIME certificate - Signs and encrypts email messages
