WGU C839 Cryptography OA 350 Questions

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Which of the following is NOT required for a hash?

Non-reversible

Minimum key length of 256 bits (correct)

Variable-length input, fixed-length output

Few collisions

What does a 'collision' refer to in cryptography?

Transposition

Substitution

Collision (correct)

Convergence

What is the purpose of a 'salt' in cryptography?

Key whitening

Key rotation

Random bits intermixed with a symmetric cipher to increase randomness and make it more secure

Random bits intermixed with a hash to increase randomness and reduce collisions (correct)

Which hash is described in RFC 1321?

MD5 Signup and view all the answers

What is the average earning of a seller per month by selling study notes on Docmerit?

$250 Signup and view all the answers

What is NOT mentioned as an upload on Docmerit?

Videos Signup and view all the answers

What is the size block used by FORK256?

512 Signup and view all the answers

In 1977, researchers at MIT described which asymmetric algorithm?

RSA Signup and view all the answers

What is the formula (M^e)(%n) related to?

Decrypting with RSA Signup and view all the answers

Which of the following equations is related to EC?

$y^2 = x^3 + Ax + B$ Signup and view all the answers

What is defined by U.S. Patent 5,231,668 and FIPS 186?

Digital Signature Algorithm (DSA) Signup and view all the answers

What is X.509?

The standard for digital certificates Signup and view all the answers

What is contained in a CRL?

Revoked certificates Signup and view all the answers

What does the Online Certificate Status Protocol (OCSP) provide?

Revoked certificates Signup and view all the answers

In terms of cryptanalysis, what does it mean to break a cipher?

finding any method to decrypt the message that is more efficient than brute force Signup and view all the answers

An authentication method that periodically re-authenticates the client by establishing a hash that is then resent from the client is called ______.

CHAP Signup and view all the answers

What is a TGS?

The server that grants Kerberos tickets Signup and view all the answers

What is Kerchoff's principle?

Only the key needs to be secret, not the actual algorithm. Signup and view all the answers

Which of the following is a fundamental principle of cryptography that holds that the algorithm can be publically disclosed without damaging security?

Kerkchoff's principle Signup and view all the answers

A process that puts a message into the least significant bits of a binary file is called what?

Steganography Signup and view all the answers

If you wished to see a list of revoked certificates from a CA, where would you look?

CRL Signup and view all the answers