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

出題：1

What is the formula m^e %n related to?

A. Encrypting with EC

B. Encrypting with RSA

C. Decrypting with RSA

D. Generating Mersenne primes

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：2

In steganography, ________ is the data to be covertly communicated (in other words, it is the message you wish to hide).

A. Carrier

B. Signal

C. Channel

D. Payload

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：3

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：4

Which of the following is the standard for digital certificates?

A. X.509

B. 509 is a standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secure protocol for browsing the web. They are also used in offline applications, like electronic signatures. An X.509 certificate contains a public key and an identity (a hostname, or an organization, or an individual), and is either signed by a certificate authority or self-signed. When a certificate is signed by a trusted certificate authority, or validated by other means, someone holding that certificate can rely on the public key it contains to establish secure communications with another party, or validate documents digitally signed by the corresponding private key.

C. CRL

D. 509
https://en.wikipedia.org/wiki/X.509

E. CA

F. RFC 2298

正解：A 解答を投票する

出題：5

Numbers that have no factors in common with another.

A. Fibonacci Numbers

B. Co-prime numbers

C. Mersenne Primes

D. Even Numbers

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：6

Which of the following is a type of encryption that has two different keys. One key can encrypt the message and the other key can only decrypt it?

A. Symmetric

B. Stream cipher

C. Asymmetric

D. Block cipher

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：7

Which of the following asymmetric algorithms is described by U.S. Patent 5,231,668 and FIPS 186

A. RC4

B. DSA

C. RSA

D. AES

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：8

A part of understanding symmetric cryptography understands the modes in which it can be used. You are explaining those modes to a group of cryptography students. The most basic encryption mode is____________.
The message is divided into blocks, and each block is encrypted separately with no modification to the process.

A. Electronic codebook (ECB)

B. Cipher block chaining (CBC)

C. Cipher feedback (CFB)

D. Output feedback (OFB)

正解：A 解答を投票する

出題：9

Why is quantum computing a threat to RSA?

A. Quantum computers can solve the discrete logarithm problem

B. The processing speed will brute force algorithms

C. Quantum computers can solve the birthday paradox

D. Quantum computers can factor large integers in polynomial time

正解：D 解答を投票する

出題：10

During the process of encryption and decryption, what keys are shared?

A. Public and private keys

B. Private keys

C. User passwords

D. Public keys

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：11

A cryptanalysis success where the attacker deduces the secret key.

A. Shannon's Entropy

B. Total Break

C. Information Deduction

D. Avalanche effect

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：12

A _________ is a digital representation of information that identifies you as a relevant entity by a trusted third party.

A. Ownership stamp

B. Hash

C. Digest

D. Digital Signature

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：13

Which of the following is a cryptographic protocol that allows two parties to establish a shared key over an insecure channel?

A. Elliptic Curve

B. NMD5

C. Diffie-Hellman

D. RSA

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：14

Ahlen is using a set of pre-calculated hashes to attempt to derive the passwords from a Windows SAM file. What is a set of pre-calculated hashes used to derive a hashed password called?

A. Password table

B. Hash matrix

C. Hash table

D. Rainbow table

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：15

Which of the following is the successor of SSL?

A. GRE

B. RSA

C. TLS

D. IPSec

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：16

MD5 can best be described as which one of the following?

A. Hashing algorithm

B. Asymmetric algorithm

C. Digital signature

D. Symmetric algorithm

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)

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