WGU C839 Pre-Assessment: Introduction to Cryptography 2023
1.Which encryption standard uses the same key to encrypt and decrypt messages ANS Symmetric Key Encryption 2.Which algorithm is designated as a Type 2 product by the National Security Agency (NSA) ANS SKIPJACK 3.What is the most commonly used format for certificates ANS X.509 v3 *Version 3* 4.What is referenced to determine if a certificate has been revoked ANS Certifi- cate Revocation List *(CRL)* 5.What needs to be installed on *end users' computers* to allow them to *trust* applications that have been *digitally signed* by the developer ANS - Sender's public key *(DEVELOPER's)* 1 / 2
6.Which type of certificate *must be certified by an authority* to verify it with other participants ANS Public Certificate 7.What is an attribute of the Rivest Cipher 4 (RC4) algorithm ANS It requires a unique nonce. *(# used ONCE)* 8.Which mode generates the key stream with a nonce and incrementing value ANS Counter (CTR) *Generates the next keystream block* by encrypting successive *values* of a "counter" 9.Which mode is a stream algorithm that concatenates an incrementing value with a nonce ANS Counter (CTR) 10.Which key would an administrator use to encrypt data so *only the
CEO can decrypt it?*: CEO's public key
Remember, when a specific person in an organization is the *ONLY* one you want to *DECRYPT* something, you must have their *PUBLIC* key 11.What is the result of a hash function ANS Digest
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