CSC 320 Final Exam Review
Questions & Answers (Grade A+)
Why is email inherently insecure?
- It lacks integrity, confidentiality, and authentication of sender
- No one likes emails
- It is not used for important business
- It lacks availability -
correct answer ✅It lacks integrity, confidentiality, and
authentication of sender
What is the number one threat to Cal Poly (and often to other large
organizations)?
- Trojan Horses
- Ransomware
- Worms
- Phishing -
correct answer ✅Phishing
How do you exchange symmetric encryption keys without a secure
channel?
- A Diffie-Hellman key exchange
- Emailing the keys to each other in the clear
- A Rupert-Stuart key exchange
,CSC 320 Final Exam Review
Questions & Answers (Grade A+)
- Signing the keys and posting them publicly -
correct answer ✅A Diffie-Hellman key exchange
In public key crypto, what happens when Alice signs her message to
Bob?
- Alice uses her public key to sign her private key
- Bob hashes the message and sends it back to Alice
- Bob can't find his private key
- Alice uses her private key to sign the hash of the message -
correct answer ✅Alice uses her private key to sign the hash of the
message
What are the attributes of a cryptographic hash function?
- Deterministic, arbitrary input size, fixed output size
- Random, fixed input size, fixed output size
- Random, arbitrary input size, fixed output size
- Deterministic, arbitrary input size, arbitrary output size -
correct answer ✅Deterministic, arbitrary input size, fixed output
size
, CSC 320 Final Exam Review
Questions & Answers (Grade A+)
In an asymmetric crypto system, there is no need for a secure
channel
- True
- False -
correct answer ✅True
In public key cryptography, if Bob receives an encrypted message
from Alice, what key does Bob use to decrypt it?
- Alice's public key
- Alice's private key
- Bob's private key
- Bob's public key -
correct answer ✅Bob's private key
What are the items of the Four Layer Internet Network Model?
- application, transport, internet and link
- application, transport, ip, and lateral
- ARP, telnet, ip, and link
- ARP, TCP, ip, and lateral -
correct answer ✅application, transport, internet and link
Questions & Answers (Grade A+)
Why is email inherently insecure?
- It lacks integrity, confidentiality, and authentication of sender
- No one likes emails
- It is not used for important business
- It lacks availability -
correct answer ✅It lacks integrity, confidentiality, and
authentication of sender
What is the number one threat to Cal Poly (and often to other large
organizations)?
- Trojan Horses
- Ransomware
- Worms
- Phishing -
correct answer ✅Phishing
How do you exchange symmetric encryption keys without a secure
channel?
- A Diffie-Hellman key exchange
- Emailing the keys to each other in the clear
- A Rupert-Stuart key exchange
,CSC 320 Final Exam Review
Questions & Answers (Grade A+)
- Signing the keys and posting them publicly -
correct answer ✅A Diffie-Hellman key exchange
In public key crypto, what happens when Alice signs her message to
Bob?
- Alice uses her public key to sign her private key
- Bob hashes the message and sends it back to Alice
- Bob can't find his private key
- Alice uses her private key to sign the hash of the message -
correct answer ✅Alice uses her private key to sign the hash of the
message
What are the attributes of a cryptographic hash function?
- Deterministic, arbitrary input size, fixed output size
- Random, fixed input size, fixed output size
- Random, arbitrary input size, fixed output size
- Deterministic, arbitrary input size, arbitrary output size -
correct answer ✅Deterministic, arbitrary input size, fixed output
size
, CSC 320 Final Exam Review
Questions & Answers (Grade A+)
In an asymmetric crypto system, there is no need for a secure
channel
- True
- False -
correct answer ✅True
In public key cryptography, if Bob receives an encrypted message
from Alice, what key does Bob use to decrypt it?
- Alice's public key
- Alice's private key
- Bob's private key
- Bob's public key -
correct answer ✅Bob's private key
What are the items of the Four Layer Internet Network Model?
- application, transport, internet and link
- application, transport, ip, and lateral
- ARP, telnet, ip, and link
- ARP, TCP, ip, and lateral -
correct answer ✅application, transport, internet and link
