WGU C839 Objective Assessment: Introduction to Cryptography 2023 – 2024 (Verified Answers)
1.Which encryption standard uses the same key to encrypt and
decrypt messages ANS Symmetric Key Encryption
2.Which algorithm is designated as a Type 2 product by the National
Security Agency (NSA) ANS SKIPJACK
3.What is the most commonly used format for certificates ANS X.509 v3
Version 3
4.What is referenced to determine if a certificate has been revoked ANS
Certifi- cate Revocation List (CRL)
- What needs to be installed on end users’ computers to allow them to
trust applications that have been digitally signed by the developer ANS -Sender’s public key (DEVELOPER’s)
6.Which type of certificate must be certified by an authority to verify it
with other participants ANS Public Certificate
7.What is an attribute of the Rivest Cipher 4 (RC4) algorithm ANS It
requires a unique nonce. (# used ONCE)
8.Which mode generates the key stream with a nonce and
incrementing value ANS Counter (CTR)
Generates the next keystream block by encrypting successive
values of a “counter”
9.Which mode is a stream algorithm that concatenates an
incrementing value with a nonce ANS Counter (CTR)
10.Which key would an administrator use to encrypt data so only the CEO can decrypt it?: CEO’s public key
Remember, when a specific person in an organization is the ONLY
one you want to DECRYPT something, you must have their PUBLIC
key