212-81試験無料問題集（208題）「EC-COUNCIL Certified Encryption Specialist 認定」

出題：1

Which of the following is a substitution cipher used by ancient Hebrew scholars?

A. Scytale

B. Caesar

C. Vigenere

D. Atbash

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：2

You are explaining the details of the AES algorithm to cryptography students. You are discussing the derivation of the round keys from the shared symmetric key. The portion of AES where round keys are derived from the cipher key using Rijndael's key schedule is called what?

A. The initial round

B. The key expansion phase

C. The round key phase

D. The bit shifting phase

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：3

The art and science of writing hidden messages so that no one suspects the existence of the message, a type of security through obscurity. Message can be hidden in picture or audio file for example. Uses least significant bits in a file to store data.

A. Steganography

B. Cryptosystem

C. Key Schedule

D. Avalanche effect

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：4

Which of the following would be the fastest.

A. EC

B. RSA

C. DH

D. AES

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：5

The ATBASH cipher is best described as what type of cipher?

A. Transposition

B. Symmetric

C. Asymmetric

D. Substitution

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：6

RFC 1321 describes what hash?

A. MD5

B. GOST

C. SHA1

D. RIPEMD

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：7

Which one of the following uses three different keys, all of the same size?

A. 3DES

B. DES

C. RSA

D. AES

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：8

What is a variation of DES that uses a technique called Key Whitening?

A. 3DES

B. Blowfish

C. DESX

D. AES

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：9

Which of the following is an asymmetric algorithm that was first publically described in 1977?

A. Elliptic Curve

B. Twofish

C. DESX

D. RSA

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

212-81試験無料問題集「EC-COUNCIL Certified Encryption Specialist 認定」