Exam Prep Questions

2017-11-03 09:05:01

1:	This attack requires the attacker to obtain several encrypted messages that have been encrypted using the same encryption algorithm. A. Known plain-text attack B. Cipher-text attack C. Clear-text attack D. Replay attack
2:	Which of the following best describes obtaining plain text from cipher text without a key? A. Frequency analysis B. Cryptanalysis C. Decryption D. Cracking
3:	This attack occurs when the attacker can intercept session keys and reuse them at a later date. A. Known plain-text attack B. Cipher-text attack C. Man-in-the-middle attack D. Replay attack
4:	Which of the following is a disadvantage of symmetric encryption? A. Key size B. Speed C. Key management D. Key strength
5:	Which of the following is not an example of a symmetric algorithm? A. DES B. RC5 C. AES D. RSA
6:	Which of the following forms of DES is considered the most vulnerable to attack? A. CBC B. ECB C. CFB D. OFB
7:	DES uses which of the following for a key size? A. 56 bit B. 64 bit C. 96 bit D. 128 bit
8:	What implementation of Triple-DES uses the same key for the first and third iterations? A. DES-EEE3 B. HAVAL C. DES-EEE2 D. DES-X
9:	Which of the following algorithms is used for key distribution, not encryption or digital signatures? A. El Gamal B. HAVAL C. Diffie-Hellman D. ECC
10:	What hashing algorithm produces a 160-bit output? A. MD2 B. MD4 C. SHA-1 D. El Gamal

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