Cryptography Quiz: test your knowledge of this important security concept.
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Cybersecurity is the practice of protecting systems, networks, and programs from digital attacks. Cryptography encrypts the data both in transit and at rest. Our information is securely transmitted over the networks. Hackers or man in the middle attackers are left biting the dust as they can not read any data which turns into gibberish cipher code on encryption. Thanks to all the algorithms devised and developed for various effective encryption methods.
Cryptography Quiz: test your knowledge of this important security concept.
- 1. 1 1.Digital signatures provide: (Select 3 answers) A. Integrity B. Authentication C. Confidentiality D. Authorization E. Non-repudiation F. Accounting 2.In cryptography, the number of bits in a key used by a cryptographic algorithm is referred to as a key size or key length. The key length determines the maximum number of combinations required to break the encryption algorithm, therefore typically a longer key means stronger cryptographic security. A. True B. False 3. Which of the following answers refers to a type of additional input that increases password complexity and provides better protection against brute-force, dictionary, and rainbow table attacks? A. Seed B. IV C. Salt D. Shim 4. An emerging field of advanced computing technologies based on the principles of physics is known as: A. DNA computing B. Edge computing C. Quantum computing D. Fog computing 5. According to predictions, the most future-proof cryptographic solution should be: A. Quantum cryptography B. Symmetric-key cryptography C. Post-quantum cryptography D. Asymmetric-key cryptography E. Public-key cryptography 6. One of the main points of vulnerability of a system is that data in _____ is not encrypted. Cryptography Quiz July 4, 2025
- 2. 2 A. use B. devices C. storage D. transmission 7. Cryptography is used to conceal data in transmission by the use of _____. A. encryption B. checksum C. decryption D. authentication 8. The term "Blockchain" refers to a decentralized digital ledger system (i.e. a specific type of a distributed database) stored across multiple computers in a P2P network. A. True B. False 9. Which of the following block cipher modes is the simplest/weakest and therefore not recommended for use? A. CBC B. GCM C. ECB D. CTR 10. A type of encryption scheme where the same key is used to encrypt and decrypt data is referred to as: (Select 3 answers) A. Session-key encryption B. Public-key encryption C. Symmetric encryption D. Asymmetric encryption E. Secret-key encryption Cryptography Quiz July 4, 2025
- 3. 3 11. In asymmetric encryption, any message encrypted with the use of a public key can only be decrypted by applying the same algorithm and a matching private key (and vice versa). A. True B. False 12. Which of the algorithms listed below does not belong to the category of symmetric ciphers? A. RC4 B. DES C. RSA D. AES E. Blowfish F. 3DES G. Twofish 13. Which of the algorithms listed below does not fall into the category of asymmetric encryption? A. RSA B. GPG C. DSA D. AES E. DHE F. ECDHE G. PGP 14. What is the purpose of steganography? A. Checking data integrity B. Verifying hash values C. Hiding data within another piece of data D. Encrypting data 15. Which of the following terms applies to the authentication process? A. Digital certificate B. MFA Cryptography Quiz July 4, 2025
- 4. 4 C. Encryption D. Security through obscurity E. Hashing 16. It takes a data in a group of same size generally to encrypt plaintext text data A. Stream Cipher B. Block Cipher C. AES D. RSA 17. Which encryption you would prefer when you need to encrypt a large amount of data A. Symmetric B. Asymmetric C. Elliptic Curve D. Stream 18. To use digital signatures, you would need the _____ key to digitally sign data, and the _____ key to verify the signature. A. hashed, decrypted B. private, public C. encrypted, decrypted D. public, private 19. A digital signature provides A. Non-repudiation B. Symmetric Encryption C. Authenticity Protection D. Integrity Protection 20. Cryptography protects data A. From being downloaded B. From Remote Code Execution C. In transit and at rest D. From DoS attack 21. Which of the following is true about Public Key Infrastructure? Cryptography Quiz July 4, 2025
- 5. 5 A. PKI is a combination of digital certificates, public-key cryptography, and certificate authorities that provide enterprise-wide security. B. PKI uses two-way symmetric key encryption with digital certificates, and Certificate Authority. C. PKI uses private and public keys but does not use digital certificates. D. PKI uses CHAP authentication. 22. Which has a key length of 128 bits? a) IDEA b) Triple-DES c) IDEA & Triple-DES d) None of the mentioned 23. Examples of hash functions are a) MD5 b) SHA-1 c) MD5 & SHA-1 d) None of the mentioned 24.Your manager wants you to review the company’s internal PKI system’s CPS for applicability and verification and to ensure that it meets current needs. What are you most likely to focus on? A. Revocations B. Trust level provided to users C. Key entropy D. How the keys are stored 25. Cryptographic hash function takes an arbitrary block of data and returns _________ a) fixed size bit string b) variable size bit string c) both fixed size bit string and variable size bit string d) variable sized byte string Cryptography Quiz July 4, 2025