Introduction to Hybrid Cryptography Answers 1. Which statement accurately describes hybrid cryptography? A. It only uses symmetric encryption for key exchange. B. It combines the strengths of both symmetric and asymmetric encryption. C. It relies solely on asymmetric encryption for data encryption. D. It uses multiple symmetric keys for each data transfer. Answer: It combines the strengths of both symmetric and asymmetric encryption. (B) Hybrid cryptography effectively merges the speed of symmetric encryption with the security of asymmetric encryption. 2. What is the primary purpose of asymmetric encryption in the context of hybrid cryptography? A. To decrypt data at a faster rate. B. To secure the exchange of the symmetric key. C. To encrypt the actual data being transferred. D. To generate multiple symmetric keys. Answer: To secure the exchange of the symmetric key. (B) Asymmetric encryption is specifically utilized to securely exchange the symmetric key between parties. 3. Which of the following is a disadvantage of hybrid cryptography? A. It introduces additional complexity to the encryption process. B. It makes key management less complex. C. It eliminates the need for symmetric keys. D. It increases encryption speed significantly. Answer: It introduces additional complexity to the encryption process. (A) Although hybrid cryptography enhances security, it complicates the overall encryption process. 4. In hybrid cryptography, what is the function of the symmetric key? A. It facilitates the generation of public keys. B. It is used only for signing digital signatures. C. It encrypts and decrypts the actual data. D. It is responsible for establishing initial connections. Answer: It encrypts and decrypts the actual data. (C) The symmetric key is utilized for the encryption and decryption of the actual data being transmitted. 5. Which of the following correctly describes a symmetric encryption method? A. It is slower than asymmetric encryption. B. It allows for key exchange without prior setup. C. It uses a pair of public and private keys. D. It relies on the secrecy of a single key for both encryption and decryption. Answer: It relies on the secrecy of a single key for both encryption and decryption. (D) Symmetric encryption utilizes one secret key to encrypt and decrypt data efficiently. 6. Which of the following examples is NOT an asymmetric encryption method? A. DSA (Digital Signature Algorithm) B. ECC (Elliptic Curve Cryptography) C. AES (Advanced Encryption Standard) D. RSA (Rivest-Shamir-Adleman) Answer: AES (Advanced Encryption Standard) (C) AES is an example of symmetric encryption, while the others are asymmetric methods. 7. What is a key aspect of the key exchange process in hybrid cryptography? A. The sender encrypts the symmetric key with the receiver's public key. B. Both parties generate new symmetric keys each time. C. The symmetric key is predetermined before the encryption begins. D. The receiver must keep their private key public. Answer: The sender encrypts the symmetric key with the receiver's public key. (A) During the key exchange, the sender uses the receiver's public key to securely encrypt the symmetric key. 8. What aspect of hybrid cryptography contributes to its efficiency? A. Combining symmetric encryption for data and asymmetric for key exchange. B. Replacing the need for key management entirely. C. Utilizing only asymmetric encryption for all data. D. Increasing the complexity of the encryption algorithms used. Answer: Combining symmetric encryption for data and asymmetric for key exchange. (A) The efficiency arises from the combination of fast symmetric encryption and secure asymmetric key exchange.