Alice and Bob would like to communicate with each other using a session key but they do not already have a shared secret key. Which algorithm can they use to exchange a secret key?
Gary is sending a message to Patricia. He wants to ensure that nobody tampers with the message while it is in transit. What goal of cryptography is Gary attempting to achieve?
When Patricia receives a message from Gary, she wants to be able to demonstrate to Sue that the message actually came from Gary. What goal of cryptography is Patricia attempting to achieve?
Which cryptographic attack offers cryptanalysts the most information about how an encryption algorithm works?
What type of function generates the unique value that corresponds to the contents of a message and is used to create a digital signature?
Alice would like to send a message to Bob using a digital signature. What cryptographic key does Alice use to create the digital signature?
Bob received a message from Alice that contains a digital signature. What cryptographic key does Bob use to verify the digital signature?
Which of the following allows a certificate authority (CA) to revoke a compromised digital certificate in real time?
Alice would like to send a message to Bob securely and wishes to encrypt the contents of the message. What key does she use to encrypt this message?
The Diffie-Hellman (DHE) algorithm is the basis for several common key exchange protocols, including Diffie-Hellman in Ephemeral mode (DHE) and Elliptic Curve DHE (ECDHE).
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A person demonstrates anonymity when posting information to a web discussion site without authorities knowing who he or she is.
A substitution cipher replaces bits, characters, or blocks of information with other bits, characters, or blocks.
A keyword mixed alphabet cipher uses a cipher alphabet that consists of a keyword, minus duplicates, followed by the remaining letters of the alphabet.
Integrity-checking tools use cryptographic methods to make sure nothing and no one has modified the software.
In a known-plaintext attack (KPA), the cryptanalyst has access only to a segment of encrypted data, and has no choice as to what that data might be.
In a chosen-ciphertext attack, cryptanalysts submit data coded with the same cipher and key they are trying to break to the decryption device to see either the plaintext output or the effect the decrypted message has on some system.
A salt value is a set of random characters you can combine with an actual input key to create the encryption key.
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The hash message authentication code (HMAC) is a hash function that uses a key to create a hash, or message digest.
Introduction to Algorithms3rd EditionCharles E. Leiserson, Clifford Stein, Ronald L. Rivest, Thomas H. Cormen