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SYMMETRIC AND ASYMMETRIC ENCRYPTION ALGORITHMS TEST QUESTIONS AND ANSWERS
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SYMMETRIC AND ASYMMETRIC ENCRYPTION ALGORITHMS TEST QUESTIONS AND ANSWERS...
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What is the most widely recognized symmetric key algorithm? -ANSWER DES
What is 3 DES? - ANSWER The more secure version of DES that
performs the equivalent of three rounds of DES encryption.
What is AES? - ANSWER The replacement algorithm for DES that is
more resistant to brute-force attacks. It is designed to be mathematically
impossible to break using current technology.
What is Blowfish? - ANSWER A highly efficient block cipher that can
have a key length up to 448 bits.
What does IDEA stand for? - ANSWER International Data Encryption
Algorithm.
What is IDEA? - ANSWER Uses 64-bit input and output data blocks
and features a 128-bit key.
What is a keystream? - ANSWER When plaintext digits are combined
with a pseudorandom cipher digit stream.
A stream cipher is a - ANSWER symmetric key cipher.
A stream cipher is where - ANSWER plaintext digits are combined with
a pseudorandom cipher digit stream.
What is a stream cipher? - ANSWER A stream cipher is a symmetric
key cipher where plaintext digits are combined with a pseudorandom
cipher digit stream.
Stream ciphers operate - ANSWER one bit at a time by applying a
pseudorandom key to the plaintext.
, Stream ciphers are used for - ANSWER a symmetric key cipher.
What is RC4? - ANSWER A stream cipher that is used by WEP.
What is RC5? - ANSWER A fast block cipher that can use a large key
size.
What is RC6? - ANSWER A cipher derived from RC5.
What is Skipjack? - ANSWER A symmetric algorithm of 80-bit lengths
developed by the NSA.
- ANSWER
The security of symmetric encryption is completely dependent upon -
ANSWER how well the key is protected. Managing the cryptographic
keys is of the utmost importance.
Skipjack was developed by - ANSWER the NSA.
What was Skipjack to be adopted by? - ANSWER Telecom companies.
It was to be embedded in communication devices via the Clipper chip.
What would Skipjack have allowed the NSA to do? - ANSWER This
would have allowed the NSA the ability to listen in on specific
conversations.
What is key management? - ANSWER The process of carefully
considering everything that could happen to a key, from securing it on
the local device to securing it on a remote device and providing
protection against corruption and loss.
What responsibilities fall under key management? - ANSWER Keys
should be stored and transmitted by secure means to avoid interception
by an unauthorized third party.
Keys should be generated by a pseudorandom process -rather than
letting users pick their own keys- to prevent guessing the key.
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