.png){kind=logo}
D334 / D 334 Objective Assessment (Latest Update 2026 / 2027) Introduction to Cryptography | All- In-One Study Guide Questions & Answers | Grade A | 100% Correct - WGU
Question:
What is the difference between OFB and CFB with regard to the output from a previous block fed into the cipher stage of the current block?
Answer:
OFB current block takes the output from the cipher stage of the previous block while CFB current block takes the output of the XOR process of the previous block.
Question:
Which symmetric block cipher uses a 112-bit key and 64-bit blocks?
Answer:
3DES
- / 4
Question:
With ___ block cipher mode operation, first the data blocks are XOR'd with the encrypted version of the initialization vector. Following that, the output of the first stage encryption is fed into the next stage, and encrypted, with the output being XOR'ed with the second block
Answer:
OFB
Question:
MD5 produces a hash value of ____ bits.
Answer:
128
Question:
____ is a Key Derivation Function defined in RFC 2898 that generates a salted hash. It is often used to create an encryption key from a defined password, and where it is not possible to reverse the password from the hashed value.
Answer:
PBKDF2
- / 4
Question:
Hashing involves creating a _____ function which cannot be ______.
Answer:
one-way, reversed
Question:
SHA-1 produces a ____-bit hash value.
Answer:
160
Question:
FIPS 140-4 is the Secure Hash Standard.
Answer:
False
Question:
From the list below, which term is best described as random bits added to a password hash to help with safeguarding passwords in storage?
Answer:
Salt 3 / 4
Question:
What are two hashing or encoding methods used for passwords in Cisco devices?
Answer:
Type 5 = Hashing with MD5 Type 7 = Encoding Method
Question:
________ provides a cryptography method to give a verifiable method that a data entity was created at a defined time.
Answer:
TSP - Time Stamp Protocol
Question:
In the Cisco environment, passwords hashed with the Type 5 method have a hash value of how many bits?
Answer:
128
- / 4
.png)