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212-81 EC-Council Certified Encryption Specialist (ECES) is now Stable and With Pass Result | Test Your Knowledge for Free

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EC-Council Certified Encryption Specialist (ECES)

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Total Questions : 206

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Question # 41

A _______ product refers to an NSA-endorsed classified or controlled cryptographic item for classified or sensitive U. S. government information, including cryptographic equipment, assembly, or component classified or certified by NSA for encrypting and decrypting classified and sensitive national security information when appropriately keyed

Options:

A.  

Туре 1

B.  

Туре 4

C.  

Туре 2

D.  

Туре 3

Discussion 0
Question # 42

Which of the following acts as a verifier for the certificate authority?

Options:

A.  

Certificate Management system

B.  

Directory management system

C.  

Registration authority

D.  

Certificate authority

Discussion 0
Question # 43

A protocol for key aggreement based on Diffie-Hellman. Created in 1995. Incorporated into the public key standard IEEE P1363.

Options:

A.  

Blum Blum Shub

B.  

Elliptic Curve

C.  

Menezes-Qu-Vanstone

D.  

Euler's totient

Discussion 0
Question # 44

A simple algorithm that will take the initial key and from that generate a slightly different key each round.

Options:

A.  

Key Schedule

B.  

Feistel Network

C.  

SHA-2

D.  

Diffie-Helman

Discussion 0
Question # 45

What does Output feedback (OFB) do:

Options:

A.  

The message is divided into blocks and each block is encrypted separately. This is the most basic mode for symmetric encryption

B.  

The cipher text from the current round is XORed with the plaintext from the previous round

C.  

A block cipher is converted into a stream cipher by generating a keystream blocks, which are then XORed with the plaintext blocks to get the ciphertext

D.  

The cipher text from the current round is XORed with the plaintext for the next round

Discussion 0
Question # 46

When learning algorithms, such as RSA, it is important to understand the mathematics being used. In RSA, the number of positive integers less than or equal to some number is critical in key generation. The number of positive integers less than or equal to n that are coprime to n is called ______.

Options:

A.  

Mersenne's number

B.  

Fermat's number

C.  

Euler's totient

D.  

Fermat's prime

Discussion 0
Question # 47

If Bob is using asymmetric cryptography and wants to send a message to Alice so that only she can decrypt it, what key should he use to encrypt the message?

Options:

A.  

Alice's private key

B.  

Bob's private key

C.  

Alice's public key

D.  

Bob's public key

Discussion 0
Question # 48

Collision resistance is an important property for any hashing algorithm. Joan wants to find a cryptographic hash that has strong collision resistance. Which one of the following is the most collisionresistant?

Options:

A.  

SHA2

B.  

MD5

C.  

MD4

D.  

PIKE

Discussion 0
Question # 49

Which one of the following best describes a process that splits the block of plaintext into two separate blocks, then applies the round function to one half, and finally swaps the two halves?

Options:

A.  

Block ciphers

B.  

Symmetric cryptography

C.  

Feistel cipher

D.  

Substitution cipher

Discussion 0
Question # 50

The Clipper chip is notable in the history of cryptography for many reasons. First, it was designed for civilian used secure phones. Secondly, it was designed to use a very specific symmetric cipher. Which one of the following was originally designed to provide built-in cryptography for the Clipper chip?

Options:

A.  

Blowfish

B.  

Twofish

C.  

Skipjack

D.  

Serpent

Discussion 0
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