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Exam 12: Cryptography

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Question 21

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In 1991, NIST established a standard called ___________________________________ to ensure that digital signatures could be verified.

Correct Answer

verified

DSS
Digital Signatur...

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Question 22

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MATCHING Match each term with the correct statement below. -takes a variable-length input and converts it to a fixed-length output string

A) asymmetric encryption
B) collision free
C) symmetric encryption
D) certificate
E) hashing
F) collision
G) stream cipher
H) message digest
I) block cipher

J) A) and F)
K) E) and F)

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verified

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Question 23

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What is RC5?

In a ____ attack, the attacker has access to the ciphertext to be decrypted and to the resulting plaintext.

ECC is an efficient algorithm requiring few resources (memory, disk space, bandwidth, and so on), so it's a perfect candidate for wireless devices and cellular telephones.

After DES was in service for many years, NIST decided that a new standard was in order: ____.

____, developed by Bruce Schneier, is a block cipher that operates on 64-bit blocks of plaintext.

RSA was developed by three MIT professors:Ronald L.Rivest, ____, and Leonard M. Adleman.

In a chosen-ciphertext attack, the attacker needs access to the cryptosystem to perform the attack.

What is a one-way function? Provide an example or an analogy to help explain the concept.

____ is a scripting language for Windows and Linux that performs repetitive tasks, such as password cracking.

Even though DEA uses 64-bit encryption, only ____ bits are effectively being used.

____________________ is a form of hiding data in plain view in pictures, graphics, or text.

The Purple Machine code was broken by ____, a cryptanalyst for the U.S. government and known as the "Father of U.S. Cryptanalysis."

What is a certificate?

The CA compiles a(n) ___________________________________ that contains all revoked and suspended certificates.

MATCHING Match each term with the correct statement below. -property of a good hashing algorithm

MATCHING Match each term with the correct statement below. -occurs if two different messages produce the same hash value

Symmetric algorithms support confidentiality, but not authentication and nonrepudiation.

Asymmetric algorithms are more scalable than symmetric systems. However, they are slower than symmetric algorithms.