Exam (elaborations)
WGU C839 Ciphers - Keys, Blocks, Rounds, And Algorithms: Questions & Accurate Answers
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WGU C839 Ciphers - Keys, Blocks, Rounds, And Algorithms: Questions & Accurate Answers
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WGU C839 Ciphers - Keys, Blocks, Rounds, AndAlgorithms: Questions & Accurate Answers
A symmetric block cipher that uses a 56-bit key and encrypts data in 64-bit
blocks. 16 rounds. | Feistel algorithm. Block cipher. Symmetric. Right Ans -
Data Encryption Standard (DES)
An encryption similar to DES but uses a key that can be three times the size, at
a 168-bit key. 16 rounds. | Feistel algorithm. Block cipher. Symmetric.
Right Ans - Triple Data Encryption Standard (3DES)
A block cipher created in the late 1990s that uses a 128-bit block size and a
128-, 192-, or 256-bit key size. 10 rounds at 128-bit, 12 at 192, or 14 at 256. |
Substitution - Permutation algorithm, Rijyndael cipher. Block cipher.
Symmetric. Right Ans - Advanced Encryption Standard (AES)
A block cipher that operates on 64-bit blocks and can have a key length from
32 to 448 bits. 16 rounds. | Feistel in BCrypt, CrashPlan, Cryptodisk,
DriveCrypt algorithm. Block cipher. Symmetric. Right Ans - Blowfish
A block cipher that operates on 128-bit blocks of data and is capable of using
cryptographic keys up to 256 bits in length. 16 rounds. | Feistel algorithm.
Block cipher. Symmetric. Right Ans - Twofish
Uses an 80-bit key, supports the same four modes of operation as DES, and
operates on 64-bit blocks of text. 32 rounds. | Unbalanced Feistel algorithm.
Block cipher. Symmetric. Right Ans - Skipjack
Block symmetric cipher that uses a 128-bit key and 64-bit block size. 8
rounds. | Lai-Massey Scheme algorithm. Block cipher. Symmetric. Right Ans
- International Data Encryption Algorithm (IDEA)
A type of symmetric block cipher defined by RFC 2144. 128 or 256 bits. 64 bit
block-size; 12 < 80 - 16 > 80. | PGP, 8-bit rounds algorithm. Block cipher.
Symmetric. Right Ans - Carlisle Adams Stafford Tavares (CAST)
128-bit key size with a 64-bit block size. 64 rounds. | Feistel algorithm. Block
cipher. Symmetric. Right Ans - Tiny Encryption Algorithm (TEA)
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