WGU D344 - Cryptosystems Questions with 100% corrrect answers + rationales

DES (Symmetric Block)

64-bit Block; 56-bit Key; 16 rounds

3DES (Symmetric Block)

64-bit Block; 112-bit Key; 48 rounds

AES (Symmetric Block)

128-bit Block; 128, 192, or 256-bit Key; 10, 12, or 14 rounds

IDEA (Symmetric Block)

64-bit Block; 128-bit Key; >17 rounds

Skipjack (Symmetric Block)

64-bit Block; 80 bit Key

Blowfish (Symmetric Block)

64-bit Block, 32-448 (128, 192, 256 common) bit Key

Twofish (Symmetric Block)

128-bit Block, 1-256 (128, 192, 256 common) bit Key Size

RC2 (Symmetric Block)

64-bit Block; 1-128 (suggested minimum =40) bit Key Size

RC5 (Symmetric Block)

32, 64, or 128-bit Block, 0-2048 bit Key; Variable 0-255 rounds

XTEA (Symmetric Block)

64-bit block; 128-bit key

RC4 (Symmetric Stream)

1-256-bit (40-bit minimum recomended) Key; 1 round

MD4 (Cryptographic Hash)

128-bit Hash Value

MD5 (Cryptographic Hash)

128-bit Hash Value

SHA-1 (Cryptographic Hash)

160-bit Hash Value

RSA (Asymmetric)

A partially homomorphic cryptosystem that leverages prime number characteristics, 1024-4096-bit Key; 1 Round

PRESENT (Light-weight Symmetric Block)

1st considered as an AES replacement for use in light

weight implementations.

64-bit Block; 80 or 128-bit Key; 32 rounds

XTEA (Light-weight Symmetric Block)

Relatively small key and block sizes and variable rounds

setting. Operates with just a just a few lines of code.

Fast speed.

64-bit Block; 128-bit Key; Variable (64 recommended) rounds

RC5 (Light-weight Symmetric Block)

A conventional method that is suitable for lightweight implementations.

32, 64, or 128-bit Block, 0-2048 bit Key; Variable 0-255 rounds

SIMON (Light-weight Symmetric Block)

Optimized for hardware implementations

32, 48, 64, 96, or 128-bit Block, 64, 72, 96,

128, 144, 192 or 256 bit Key; Variable (32 or 44

common) rounds32, 48, 64, 96, or 128-bit Block, 64, 72, 96,

128, 144, 192 or 256 bit Key; Variable (32 or 44

common) rounds

SPECK (Light-weight Symmetric Block)

Optimized for software implementations.

32, 48, 64, 96, or 128-bit Block; Variable bit Key; Variable (32 or 44 common) rounds

CLEFIA (Light-weight Symmetric Block)

128-bit Block; 128, 192 and 256 bit Key; 18, 22, or 26 rounds

Rabbit (Light-weight Symmetric Stream)

128 bit Key; 64-bit IV

Mickey v2 (Light-weight Symmetric Stream)

80 bit Key; Variable up to 80-bit IV

Trivium (Light-weight Symmetric Stream)

80 bit Key; 80-bit IV

Grain (Light-weight Symmetric Stream)

80 bit Key; 64-bit IV

Enocoro (Light-weight Symmetric Stream)

128 bit Key; 64-bit IV

PHOTON (Light-weight Hashing)

Hash functions support up to 264 bits. Different size hash values are available.

80, 128, 160, 224, or 256-bit Hash Values

Lesamnta-LW (Light-weight Hashing)

Fast (five times faster than SHA 256). Primary target

implementation is 8-bit CPUs for short message hashing.

256-bit Hash Value

Quark (Light-weight Hashing)

Can be used for hashing and in stream encryption.

64 or 128-bit Hash Values

Chaskey (Light-weight Signing)

Light-weight cryptography method for signing messages (MAC). Relatively undemanding hardware implementation (only ~3,333 gates required at 1MHz clock rate) making it suitable for IoT implementation.

128-bit

Elli (Light-weight Signing)

Light Weight public key solution . Short for "Elliptic Light". Uses Elliptic Curves along with a Diffie Hellman related handshake between the RFID tag and the RFID reader in RFID implementations .