EC-COUNCIL Certified Encryption Specialist - 212-81 Exam Practice Test
What is the largest key size that AES can use?
Correct Answer: A
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Bob's password is hashed, and so is John's. Even though they used different passwords, the hash is the same. What is this called?
Correct Answer: B
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Hash algortihm created by the Russians. Produces a fixed length output of 256bits. Input message is broken up into 256 bit blocks. If block is less than 256 bits then it is padded with 0s.
Correct Answer: D
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Changing some part of the plain text for some matching part of cipher text. Historical algorithms typically use this.
Correct Answer: D
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Which of the following is generally true about key sizes?
Correct Answer: D
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John is responsible for VPNs at his company. He is using IPSec because it has two different modes. He can choose the mode appropriate for a given situation. What are the two modes of IPSec? (Choose two)
Correct Answer: A,B
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In 1977 researchers and MIT described what asymmetric algorithm?
Correct Answer: C
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In a ______ the attacker discovers a functionally equivalent algorithm for encryption and decryption, but without learning the key.
Correct Answer: B
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Which of the following are valid key sizes for AES (choose three)?
Correct Answer: A,B,D
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In IPSec, if the VPN is a gateway-gateway or a host-gateway, then which one of the following is true?
Correct Answer: B
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Which analysis type is based on the statistics of the numbers of unique colors and close-color pairs in a 24-bit image, a method that analyzes the pairs of colors created by LSB embedding?
Correct Answer: C
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Symmetric algorithm. Designed by James Massey and Xuejia Lai. Operates on 64 bit blocks and has a 128 bit key. Consists of 8 identical transformations each round and an output transformation.
Correct Answer: A
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A symmetric Stream Cipher published by the German engineering firm Seimans in 1993. A software based stream cipher that uses a Lagged Fibonacci generator along with concepts borrowed from shrinking generator ciphers.
Correct Answer: A
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The most widely used asymmetric encryption algorithm is what?
Correct Answer: D
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