Network Security - Modules 15 – 17: Cryptography Group Exam

1. Which algorithm can ensure data integrity?

• RSA

• AES

• MD5

• PKI

2. What is the keyspace of an encryption algorithm?

• • the set of all possible values used to generate a key

• • the set of procedures used to calculate asymmetric keys

• • the set of hash functions used to generate a key

• • the mathematical equation that is used to create a key

3. Alice and Bob are using a digital signature to sign a document. What key should Alice use to sign the document so that Bob can make sure that the document came from Alice?

• • private key from Bob

• • private key from Alice

• • public key from Bob

• • username and password from Alice

4. Which three security services are provided by digital signatures? (Choose three.)

• • provides nonrepudiation using HMAC functions

• • guarantees data has not changed in transit

• • provides data encryption

• • authenticates the source

• • provides confidentiality of digitally signed data

5. What is another name for confidentiality of information?

• • consistency

• trustworthiness

• accuracy

• privacy

6. As data is being stored on a local hard disk, which method would secure the data from unauthorized access?

• • a duplicate hard drive copy

• • deletion of sensitive files

• • two factor authentication

• • data encryption

7. What popular encryption algorithm requires that both the sender and receiver know a pre-shared key?

• PKI

• MD5

• AES

• HMAC

8. In which method used in cryptanalysis does the attacker know a portion of the plaintext and the corresponding ciphertext?​

• • meet-in-the-middle

• • brute-force

• chosen-plaintext

• • ciphertext

9. Match the disciplines or roles to the descriptions:

The science of making and breaking secret codes

• Cryptanalyst

• Cryptology

• Cryptography

• Cryptanalysis

9. Match the disciplines or roles to the descriptions:

The development and use of codes

• Cryptanalyst

• Cryptology

• Cryptography

• Cryptanalysis