Summary WGU C839 Objective Assessment Verified

WGU C839 Objective Assessment 2023


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 -

, 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