C839 - Introduction to Cryptography
Which encryption standard uses the same key to encrypt and decrypt messages? -
Answer-Symmetric Key Encryption
Which algorithm is designated as a Type 2 product by the National Security Agency
(NSA)? - Answer-SKIPJACK
What is the most commonly used format for certificates? - Answer-X.509 v3 *Version 3*
What is referenced to determine if a certificate has been revoked? - Answer-Certificate
Revocation List *(CRL)*
What needs to be installed on *end users' computers* to allow them to *trust*
applications that have been *digitally signed* by the developer? - Answer-Sender's
public key *(DEVELOPER's)*
Which type of certificate *must be certified by an authority* to verify it with other
participants? - Answer-Public Certificate
What is an attribute of the Rivest Cipher 4 (RC4) algorithm? - Answer-It requires a
unique nonce. *(# used ONCE)*
Which mode generates the key stream with a nonce and incrementing value? -
Answer-Counter (CTR)
*Generates the next keystream block* by encrypting successive *values* of a "counter"
Which mode is a stream algorithm that concatenates an incrementing value with a
nonce? - Answer-Counter (CTR)
Which key would an administrator use to encrypt data so *only the CEO can decrypt it?*
- Answer-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
What is the result of a hash function? - Answer-Digest
What is used to efficiently encrypt *large files?* - Answer-Symmetric encryption
An administrator needs to encrypt the following word with the Atbash cipher:
