Top 20 Cyber Security Questions & Answers

In today’s increasingly digital society, cyber security is an urgent concern due to the substantial hazards posed by data breaches and cyberattacks to individuals, businesses, and governments. To thrive here, you need to be knowledgeable and vigilant. This list of the top 20 cybersecurity questions and answers covers everything from the basics of internet security to more advanced issues like threat detection and incident response. Whether you’re new to cybersecurity or have years of experience, this guide will help you protect your digital life and belongings.

Now, let’s move on to the top 20 Cyber Security Questions & Answers

Q1. True or False? In cryptography, a keyspace is the number of possible keys to a cipher.

Select one:
a.True
b. False

Q2. True or False? In a known-plaintext attack (KPA), the cryptanalyst has access only to a segment of encrypted data and has no choice as to what that data might be.

Select one:
a.True
b. False

Q3. True or False? You must always use the same algorithm to encrypt information and decrypt the same information.

Select one:
a.True
b. False

Q4. Which of the following is not an objective of cryptanalysis, the process of breaking codes?

a. Encrypt the plaintext of a target message
b. Determine the key used to encrypt a target message
c.Derive the algorithm used by a particular cipher
d. Solve the general mathematical problem underlying the cryptography

Q5. True or False? Whereas a cipher performs a particular task, a key gives the specific directions for how to do it.

Select one:
a.True
b. False

Q6. Bob is sending a message to Alice. He wants to ensure that nobody tampers with the message while it is in transit. What goal of cryptography is Bob attempting to achieve?

a. Confidentiality
b. Integrity
c. Authentication
d. Nonrepudiation

Q7. True or False? Symmetric key ciphers require that both parties first exchange keys to be able to securely communicate.

Select one:
a.True
b. False

Q8. Which information security objective verifies the action to create an object or verifies an object’s existence by an entity other than the creator?

a. Validation
b. Authorization
c. Certification
d. Witnessing

Q9. What is the only unbreakable cipher when it is used properly?

a. Rivest-Shamir-Adelman (RSA)
b. Vernam
c. Elliptic Curve Diffie-Hellman Ephemeral (ECDHE)
d. Blowfish

Q10. True or False? A private key cipher is also called an asymmetric key cipher.

Select one:
a.True
b. False

Q11. Which type of cipher works by rearranging the characters in a message?

a. Substitution
b. Steganographic
c. Transposition
d. Asymmetric

Q12. Bob is sending a message to Alice. He wants to ensure that nobody can read the content of the message while it is in transit. What goal of cryptography is Bob attempting to achieve?

a. Confidentiality
b. Integrity
c. Authentication
d. Nonrepudiation

Q13. Which of the following is not true of hash functions?

a. Hash functions help detect forgeries by computing a checksum of a message and then combining it with a cryptographic function so that the result is tamperproof.
b. The hashes produced by a specific hash function may vary in size.
c. A hash is a checksum designed so that no one can forge a message in a way that will result in the same hash as a legitimate message.
d. The output from the message digest algorithm (MD5) or the Secure Hash Algorithm (SHA) hash provides input for an asymmetric key algorithm that uses a private key as input.

Q14. True or False? A digitized signature is a combination of a strong hash of a message and a secret key.

Select one:
a.True
b.False

Q15. Maria receives a ciphertext message from her colleague Wen. What type of function does Maria need to use to read the plaintext message?

a. Encryption
b. Hashing
c. Decryption
d. Validation

Q16. Which set of characteristics describes the Caesar cipher accurately?

a. Asymmetric, block, substitution
b. Asymmetric, stream, transposition
c. Symmetric, stream, substitution
d. Symmetric, block, transposition

Q17. True or False? A keyword mixed alphabet cipher uses a cipher alphabet that consists of a keyword, minus duplicates, followed by the remaining letters of the alphabet.

Select one:
a.True
b.False

Q18. Which approach to cryptography uses highly parallel algorithms that could solve problems in a fraction of the time needed by conventional computers?

a. Quantum cryptography
b. Asymmetric cryptography
c. Elliptic curve cryptography
d. Classic cryptography

Q19. True or False? The U.S. government currently has no standard for creating cryptographic keys for classified applications.

Select one:
a.True
b.False

Q20. True or False? You can break a cipher by analyzing the ciphertext to find the plaintext or key or by analyzing the ciphertext and its associated plaintext to find the key.

Select one:
a.True
b.False