Can you answer these Security+ encryption practice test questions related to symmetric and asymmetric encryption? You should if you plan to take the Security+ exam. This post should help.
Q1. Your network requires a secure method of sharing encryption keys over a public network. Which of the following is the BEST choice?
A. Symmetric encryption
B. Bcrypt
C. Diffie-Hellman
D. Steganography
Answer below.
Q2. Bart wants to send a secure email to Lisa so he decides to encrypt it. Bart wants to ensure that Lisa can verify that he sent it. Which of the following does Lisa need to meet this requirement?
A. Bart’s public key
B. Bart’s private key
C. Lisa’s public key
D. Lisa’s private key
Answer below.
Q3. Bart wants to send a secure email to Lisa so he decides to encrypt it. Bart wants to ensure that Lisa can decrypt it. Which of the following does Lisa need to decrypt it?
A. Bart’s public key
B. Bart’s private key
C. Lisa’s public key
D. Lisa’s private key
Answer below.
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Security+ Encryption Practice Test Questions with Answers
Q1. Your network requires a secure method of sharing encryption keys over a public network. Which of the following is the BEST choice?
A. Symmetric encryption
B. Bcrypt
C. Diffie-Hellman
D. Steganography
Q1 Answer: C is correct. Diffie-Hellman allows entities to negotiate encryption keys securely over a public network.
Once the entities negotiate the keys, they use symmetric encryption, but they can’t share keys using symmetric encryption without first using a secure method such as Diffie-Hellman.
Bcrypt is a key stretching technique used by some Unix systems to make password cracking more difficult.
Steganography hides data within data, but it isn’t the best method of sharing encryption keys over a public network.
Q2. Bart wants to send a secure email to Lisa so he decides to encrypt it. Bart digitally signs it and wants to ensure that Lisa can verify that he sent it. Which of the following does Lisa need to meet this requirement?
A. Bart’s public key
B. Bart’s private key
C. Lisa’s public key
D. Lisa’s private key
Q2 Answer. A is correct. Lisa would decrypt the digital signature with Bart’s public key. The digital signature provides verification that Bart sent the message, non-repudiation, and integrity for the message.
Bart encrypts the digital signature with his private key, which can only be decrypted with his public key.
Lisa’s keys are not used for Bart’s digital signature, but might be used for the encryption of the email.
Although not part of this scenario, Bart would encrypt the email with Lisa’s public key and Lisa would decrypt the email with Lisa’s private key.
Q3. Bart wants to send a secure email to Lisa so he decides to encrypt it. Bart wants to ensure that Lisa can decrypt it. Which of the following does Lisa need to decrypt it?
A. Bart’s public key
B. Bart’s private key
C. Lisa’s public key
D. Lisa’s private key
Q3 Answer. D is correct. Lisa needs her private key to decrypt it.
Bart would encrypt the message with Lisa’s public key.
Bart encrypts the digital signature with his private key, which can only be decrypted with his public key.
Bart’s keys are not used for encrypting data that Lisa can decrypt.
The 501 Version of the Study Guide
The CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide
is an update to the top-selling SY0-201, SY0-301, and SY0-401 study guides, which have helped thousands of readers pass the exam the first time they took it. It includes the same elements readers raved about in the previous three versions.Each of the eleven chapters presents topics in an easy to understand manner and includes real-world examples of security principles in action.
You’ll understand the important and relevant security topics for the Security+ exam, without being overloaded with unnecessary details. Additionally, each chapter includes a comprehensive review section to help you focus on what’s important.
Over 300 realistic practice test questions with in-depth explanations will help you test your comprehension and readiness for the exam. The book includes:
- A 75 question pre-test
- A 75 question post-test
- Practice test questions at the end of every chapter.
Each practice test question includes a detailed explanation to help you understand the content and the reasoning behind the question. You’ll be ready to take and pass the exam the first time you take it.
If you plan to pursue any of the advanced security certifications, this guide will also help you lay a solid foundation of security knowledge. Learn this material, and you’ll be a step ahead for other exams. This SY0-501 study guide is for any IT or security professional interested in advancing in their field, and a must-read for anyone striving to master the basics of IT security.
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