CRYPTOGRAPHY EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Cryptography is the science of:
A. Securing information through encoding
B. Building hardware systems
C. Managing databases
D. Increasing CPU speed
Answer: A
Rationale: Cryptography protects information using mathematical techniques.
2. The main goal of cryptography is to ensure:
A. Confidentiality, integrity, and authentication
B. Faster internet
C. More storage
D. Better graphics
Answer: A
Rationale: Core security principles (CIA triad).
3. Plaintext refers to:
A. Original readable message
B. Encrypted data
C. Hash value
D. Cipher key
Answer: A
Rationale: Message before encryption.
4. Ciphertext is:
,A. Encrypted message
B. Original message
C. Decrypted file
D. Password hash
Answer: A
Rationale: Output of encryption.
5. Encryption is the process of:
A. Converting plaintext to ciphertext
B. Deleting data
C. Compressing files
D. Formatting disk
Answer: A
Rationale: Securing data transformation.
6. Decryption is:
A. Converting ciphertext back to plaintext
B. Encrypting data
C. Deleting files
D. Hashing data
Answer: A
Rationale: Reverse of encryption.
7. A cryptographic key is used to:
A. Control encryption and decryption
B. Increase CPU speed
C. Store files
D. Compress data
Answer: A
Rationale: Key controls security operations.
8. Symmetric encryption uses:
, A. Same key for encryption and decryption
B. Two different keys
C. No keys
D. Public key only
Answer: A
Rationale: Shared secret key system.
9. Asymmetric encryption uses:
A. Public and private key pair
B. Same key
C. No key
D. Hardware key only
Answer: A
Rationale: Two-key system.
10. Public key is used for:
A. Encrypting data
B. Decrypting private messages only
C. Deleting data
D. Formatting disks
Answer: A
Rationale: Used by sender to encrypt.
11. Private key is used for:
A. Decryption
B. Encryption only
C. Compression
D. Transmission
Answer: A
Rationale: Used by receiver.
12. RSA is an example of:
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Cryptography is the science of:
A. Securing information through encoding
B. Building hardware systems
C. Managing databases
D. Increasing CPU speed
Answer: A
Rationale: Cryptography protects information using mathematical techniques.
2. The main goal of cryptography is to ensure:
A. Confidentiality, integrity, and authentication
B. Faster internet
C. More storage
D. Better graphics
Answer: A
Rationale: Core security principles (CIA triad).
3. Plaintext refers to:
A. Original readable message
B. Encrypted data
C. Hash value
D. Cipher key
Answer: A
Rationale: Message before encryption.
4. Ciphertext is:
,A. Encrypted message
B. Original message
C. Decrypted file
D. Password hash
Answer: A
Rationale: Output of encryption.
5. Encryption is the process of:
A. Converting plaintext to ciphertext
B. Deleting data
C. Compressing files
D. Formatting disk
Answer: A
Rationale: Securing data transformation.
6. Decryption is:
A. Converting ciphertext back to plaintext
B. Encrypting data
C. Deleting files
D. Hashing data
Answer: A
Rationale: Reverse of encryption.
7. A cryptographic key is used to:
A. Control encryption and decryption
B. Increase CPU speed
C. Store files
D. Compress data
Answer: A
Rationale: Key controls security operations.
8. Symmetric encryption uses:
, A. Same key for encryption and decryption
B. Two different keys
C. No keys
D. Public key only
Answer: A
Rationale: Shared secret key system.
9. Asymmetric encryption uses:
A. Public and private key pair
B. Same key
C. No key
D. Hardware key only
Answer: A
Rationale: Two-key system.
10. Public key is used for:
A. Encrypting data
B. Decrypting private messages only
C. Deleting data
D. Formatting disks
Answer: A
Rationale: Used by sender to encrypt.
11. Private key is used for:
A. Decryption
B. Encryption only
C. Compression
D. Transmission
Answer: A
Rationale: Used by receiver.
12. RSA is an example of:
