WGU C839 Objective Assessment 2023 - 2024
1.DES: 64 Bit Block - 56 Bit Key - 16 Rounds
2.AES: 128 Bit Block - 128, 192, 256 Bit Key - 10, 12, 14 Rounds
3.BlowFish: 64 Bit Block - 32 thru 448 Bit Key - 16 Rounds
4.TwoFish: 128 Bit Block - 1 thru 256 Bit Key - 16 Rounds
5.Serpent: 128 Bit Block 128, 192, 256 Bit Key - 32 Rounds
6.SkipJack: 64 Bit Block - 80 Bit Key - 32 Rounds
7.IDEA: 64 Bit Block - 128 Bit Key - 8.5 Rounds
8.Symmetric Block Ciphers: DES - AES - BlowFish - TwoFish -
Serpent - SkipJack - IDEA
9.Symmetric Block Ciphers with 64 Bit Block Size: DES - BlowFish -
SkipJack -IDEA 10.Symmetric Block Ciphers with 128 Bit Block Size: AES - TwoFish - 1 / 2
Serpent
11.Symmetric Block Ciphers with 128, 192, 256 Bit Key Size: AES - Serpent
12.Symmetric Block Ciphers with 16 Rounds: DES - BlowFish - TwoFish
13.Symmetric Block Ciphers with 32 Rounds: Serpent - SkipJack
14.RC4: 1 thru 2048 Bit Key Size & 1 Round (40 bit minimum
recommended)
15.FISH: Uses Lagged Fibonacci pseudorandom number generator
16.PIKE: Revised version of FISH to address known plaintext attack
vulnerabilities
17.Symmetric Stream Ciphers: RC4 - Fish - Pike
18.Asymmetric Encryption Algos: RSA - ECC - El Gamal - DSA
19.RSA: Leverages prime number characteristics, 1024-4096 bit
variable key size, 1 round. Uses Trapdoor function to enable use for encryption and digital signatures. One-way trapdoor functions can be inverted with knowledge of trapdoor factorization information.
20.ECC: Leverages discrete logarithm characteristics
21.El Gamal: Used in recent versions of PGP
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