WGU C839 Flash Cards for OA Q&A 2025

WGU C839 Flash Cards for OA Q&A 2025 DES - answer-64 Bit Block - 56 Bit Key - 16 Rounds AES - answer-128 Bit Block - 128, 192, 256 Bit Key - 10, 12, 14 Rounds BlowFish - answer-64 Bit Block - 32 thru 448 Bit Key - 16 Rounds TwoFish - answer-128 Bit Block - 1 thru 256 Bit Key - 16 Rounds Serpent - answer-128 Bit Block 128, 192, 256 Bit Key - 32 Rounds SkipJack - answer-64 Bit Block - 80 Bit Key - 32 Rounds IDEA - answer-64 Bit Block - 128 Bit Key - 8.5 Rounds Symmetric Block Ciphers - answer-DES - AES - BlowFish - TwoFish - Serpent - SkipJack - IDEA Symmetric Block Ciphers with 64 Bit Block Size - answer-DES - BlowFish - SkipJack - IDEA Symmetric Block Ciphers with 128 Bit Block Size - answer-AES - TwoFish - Serpent Symmetric Block Ciphers with 128, 192, 256 Bit Key Size - answer-AES - Serpent Symmetric Block Ciphers with 16 Rounds - answer-DES - BlowFish - TwoFishSymmetric Block Ciphers with 32 Rounds - answer-Serpent - SkipJack RC4 - answer-1 thru 2048 Bit Key Size & 1 Round (40 bit minimum recommended) FISH - answer-Uses Lagged Fibonacci pseudorandom number generator PIKE - answer-Revised version of FISH to address known plaintext attack vulnerabilities Symmetric Stream Ciphers - answer-RC4 - Fish - Pike Asymmetric Encryption Algos - answer-RSA - ECC - El Gamal - DSA RSA - answer-Leverages prime number characteristics, 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. ECC - answer-Leverages discrete logarithm characteristics El Gamal - answer-Used in recent versions of PGP DSA - answer-A Federal Information Processing Standard for digital signatures (FIPS 186) Hash Algos - answer-MD5 - SHA1 - SHA256 - FORK256 - RIPEMD160 - GOST - TIGER