CAS004: Set 4

Most authentication systems make use of a one-way encryption process. Which of the following best offers an example of one-way encryption?

• Asymmetric encryption

• Symmetric encryption

• Hashing

• PKI

A junior administrator comes to you in a panic after seeing the cost for certificates. She would like to know if there is a way to get one certificate to cover all domains and subdomains for the organization. What solution can you offer?

• Wildcards

• Blanket certificates

• Distributed certificates

• No solution exists

You've discovered that an expired certificate is being used repeatedly to gain logon privileges. To what list should the certificate have been added?

• Wildcard verification

• Expired key revocation list

• Online Certificate Status Protocol

• Certificate revocation list (CRL)

A coworker is concerned about the veracity of a claim because the sender of an email denies sending it. The coworker wants a way to prove the authenticity of an email. Which would you recommend?

• Hashing

• Digital signature

• Symmetric encryption

• Asymmetric encryption

A junior administrator at a sister company called to report a possible exposed private key that is used for PKI transactions. The administrator would like to know the easiest way to check whether the lost key has been flagged by the system. What are you going to tell the administrator?

• Hashing

• Issuance to entities

• Online Certificate Status Protocol

• Wildcard verification

Which of the following is an early form of encryption also known as ROT3?

• Transposition cipher

• Substitution cipher

• Scytale

• Caesar's cipher

Which of the following is not an advantage of symmetric encryption?

• It's powerful

• A small key works well for bulk encryption

• It offers confidentiality

• Key exchange is easy

Which type of encryption best offers easy key exchange and key management?

• Symmetric

• Asymmetric

• Hashing

• Digital signatures

What is the correct term for when two different files are hashed and produce the same hashed output?

• Session key

• Digital signature

• Message digest

• Collision

Which of the following can be used to describe a physical security component that is used for cryptoprocessing and can be used to securely store digital keys?

• HSM

• TPM

• HMAC

• OCSP