WGU C839v5- D334 Additional Practice INTRODUCTION TO CRYPTOGRAPHY

WGU C839v5 - D334 Additional Practice INTRODUCTION TO CRYPTOGRAPHY 128 - The hash value in bits for MD5 is ____. A. 128 B. 160 C. 256 variable; fixed - Hashing involves taking a _____ leng th input and producing a _____ length output (message digest). A. fixed; fixed B. variable; fixed C. fixed; variable 160 - The hash value in bits for SHA -1 is ____. A. 128 B. 160 C. 256 128 - The hash value in bits for MD4 is ____. A. 128 B. 160 C. 256 Transport - IPSec ______ mode involves "end -to-end" encryption; i.e. data remains encrypted from the time it leaves a sender's device to the time it arrives at the receiver's device. A. Tunnel B. Transport C. Trusted Tunnel - IPSec ______ mode involves en cryption from gateway to gateway, i.e. just through the public network space. A. Tunnel B. Transport C. Trusted Tunnel Remember, with tunnel mode, encryption does not happen until just before it leaves the local network. Traffic likely remains unencrypt ed between the end user device and the local network boundary. - A security analyst on a local network using monitoring tools is likely to only be able to read contents of traffic encrypted using IPSec ______ mode. A. Tunnel B. Transport C. Trusted Chaske y - _____ is a lightweight cryptography method for signing messages (MAC). It boasts a relatively undemanding hardware implementation (only ~3,333 gates required at 1MHz clock rate) making it suitable for IoT implementation. 128 - Chaskey has a key size o f _____ bits. A. 256 B. 128 C. 80 salt - A weakness of one -way hashing is that the same piece of plaintext will result in the same ciphertext unless _____ is applied. A. Salt B. Ash C. Ether 40 - The minimum recommended key size to use with RC4 is _____ bits. A. 40 B. 20 C. 64 2048 - RC4 is a symmetric stream cipher with a variable key size up to a max of _____ bits. A. 256 B. 2048 C. 1024 Data Encryption Standard (DES) - _____ has a block s ize of 64 bits, key size of 56 bits, and 16 rounds of substitution & transposition.