01. What is one of the key reasons why lattice-based cryptography is being researched as a potential solution to quantum computing threats?
a) It requires a smaller key size for higher security.
b) It is more efficient than RSA.
c) It can be implemented with fewer computational resources.
d) It is resistant to attacks from Shor’s algorithm.
02. What is the main advantage of quantum computers over classical computers in the context of cryptography?
a) Quantum computers do not require any cryptographic algorithms.
b) Quantum computers can break cryptographic algorithms more slowly than classical computers.
c) Quantum computers are more efficient at encryption than classical computers.
d) Quantum computers can solve certain mathematical problems, such as factoring large integers, exponentially faster than classical computers.
03. Which of the following are families of post-quantum cryptography - classical algorithms designed to remain secure against an adversary with a large-scale quantum computer?
(Choose two.)
a) RSA encryption
b) Hash-based signature schemes
c) Lattice-based cryptography
d) Quantum key distribution
04. Which of the following are methods used in cryptanalysis to attack symmetric encryption systems?
(Choose two.)
a) Differential cryptanalysis
b) Key stretching
c) Elliptic curve cryptography
d) Brute-force attack
05. Which of the following cryptanalytic techniques exploit the statistical structure of ciphertext to break classical substitution ciphers?
(Choose two.)
a) Linear cryptanalysis
b) Frequency analysis
c) Kasiski examination
d) Brute-force attack
06. Which of the following is a quantum key distribution protocol used to achieve secure communication between parties?
a) AES
b) BB84
c) Diffie-Hellman
d) RSA
07. Which of the following recovers the length of the keyword used in a Vigenère cipher, the step that reduces it to a series of Caesar shifts?
a) Kasiski examination
b) Brute force with large prime numbers
c) Linear cryptanalysis
d) Frequency analysis
08. Which two of the following attack the key space or the implementation of AES rather than the cipher's mathematical structure?
(Choose two.)
a) Brute-force attacks on the key
b) Linear cryptanalysis
c) Side-channel attacks
d) Differential cryptanalysis
09. You are setting up a secure communication system for an organization that requires employees to exchange encrypted email messages. The organization wants to ensure that only the intended recipient can decrypt the email and that the email content has not been altered in transit.
Which of the following technologies would you recommend, and why?
a) SSL/TLS, because it encrypts email content during transmission
b) AES, because it secures email communication without a certificate
c) BitLocker, because it provides file-level encryption
d) PGP (Pretty Good Privacy), because it provides end-to-end encryption and digital signatures
10. You are tasked with advising a financial institution on the potential impact of quantum computing on their cryptographic systems. The institution currently relies heavily on RSA and ECC for securing sensitive data and transactions.
With the advancements in quantum computing, what changes should you recommend to ensure the continued security of their systems in the future?
a) Continue using RSA and ECC, as quantum computers are not likely to pose a threat for the next several decades.
b) Move to post-quantum cryptographic algorithms that are quantum-resistant, but continue using RSA and ECC until they are fully broken.
c) Transition to using lattice-based cryptography and explore the adoption of quantum key distribution (QKD) for secure key exchange.
d) Encrypt all data with symmetric encryption and ensure that all keys are long enough to withstand brute-force attacks.
The purpose of this Sample Question Set is to provide you with information about the EC-Council Encryption Specialist exam. These sample questions will make you very familiar with both the type and the difficulty level of the questions on the 212-81 certification test. To get familiar with real exam environment, we suggest you try our Sample EC-Council Encryption Specialist Certification Practice Exam. This sample practice exam gives you the feeling of reality and is a clue to the questions asked in the actual EC-Council Certified Encryption Specialist (ECES) certification exam.
