WGU C839, Exam Questions and answers. VERIFIED. RATED A+

WGU C839, Exam Questions and answers. VERIFIED. RATED A+ Symmetric - -Which encryption standard uses the same key to encrypt and decrypt messages? Skipjack - -Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? X.509 v3 - -What is the most commonly used format for certificates? Certificate revocation list (CRL) - -What is referenced to determine if a certificate has been revoked? Sender's public key - -What needs to be installed on end users' computers to allow them to trust applications that have been digitally signed by the developer? Public Certificate - -Which type of certificate must be certified by an authority to verify it with other participants? It requires a unique nonce. - -What is an attribute of the Rivest Cipher 4 (RC4) algorithm? Counter (CTR) - -Which mode generates the key stream with a nonce and incrementing value? Counter (CTR) - -Which mode is a stream algorithm that concatenates an incrementing value with a nonce? CEO's public key - -Which key would an administrator use to encrypt data so only the CEO can decrypt it? Digest - -What is the result of a hash function? Symmetric encryption - -What is used to efficiently encrypt large files? hvxfirgb - -An administrator needs to encrypt the following word with the Atbash cipher: security What is the correct ciphertext? Message Digest Algorithm 5 (MD5) - -Which cryptographic algorithm has a 128-bit hash size? Collision resistance - -Which characteristic makes a hashing function suitable for use in signature schemes? Partial-message collision - -Which attribute of a hashing function makes a birthday attack possible? SHA-1 - -Which hash algorithm produces a 160-bit output value? Previous generated ciphertext - -What does cipher block chaining (CBC) use with the key to encrypt subsequent blocks of plaintext? Electronic codebook (ECB) - -Which mode produces the same ciphertext from two identical plaintext blocks? Electronic codebook (ECB) - -Which encryption mode is least secure? P = E (K,C) - -What is the mathematical formula used for symmetric decryption? Rivest-Shamir-Adleman - -Which algorithm relies on factoring the product of large prime numbers? Pretty Good Privacy (PGP) - -Which encryption technology is a serial combination of hashing, data compression, symmetric-key cryptography, and public key infrastructure (PKI) and can be used for encrypting texts, emails, files, and directories or for full disk encryption? Kerckhoffs's principle - -Which concept stipulates that algorithms should be openly shared and scrutinized, but keys must be absolutely secured? Randomizing the initialization vector - -Which encryption process minimizes known plaintext attacks against Advanced Encryption Standard (AES)? Salting - -What prevents a rainbow table attack during the encryption process?