Chapter 2: Cybersecurity · Term 1
Lesson 2-1 explained: Cryptographic Technologies and Authentication
HTTPS uses public-key cryptography to share a key safely and common-key cryptography to move data quickly. Services stay safe by layering encryption, certificates, signatures, and multi-factor authentication.
Lesson summary
HTTPS combines public-key cryptography — used to share a key safely — with common-key cryptography — used to exchange data quickly — so communication is both secure and fast.
Takeaway: HTTPS uses public-key cryptography to share a key safely and common-key cryptography to move data quickly. Services stay safe by layering encryption, certificates, signatures, and multi-factor authentication.
Key terms
- HTTPS
- Public-key cryptography
- Common-key cryptography
- Multi-factor authentication
- Digital signature
- Digital certificate
- Encryption
Textbook page: Arabic book 31 · English book 33
Video lesson
Languages review: encryption, MFA, web design, A/B testing and AI ethics
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Free questions on this lesson
From the textbook question bank. Think of the answer first, then open it.
1. What does HTTPS add to HTTP?
- File compression before sending
- A fixed IP address for the site
- Faster image loading
- TLS encryption
Answer
Correct answer: TLS encryption
HTTPS is HTTP with TLS encryption added.
1. How HTTPS Communication Works · page 34
2. What is multi-factor authentication?
- Changing the password every week
- Logging in from two devices at once
- Using one very long, complex password
- Combining two or more of the three factors
Answer
Correct answer: Combining two or more of the three factors
Multi-factor authentication combines two or more of: knowledge, possession and biometric.
2. Use of Authentication in Real Services · page 35
3. Which technology verifies that the communication partner is authentic?
- Digital certificate
- Common-key cryptography
- Multi-factor authentication
- Digital signature
Answer
Correct answer: Digital certificate
A digital certificate proves a site is genuine; a certificate authority vouches for it.
3. Combinations of Security Technologies · page 36
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Lessons in this chapter 2: Cybersecurity
- 2-1 Cryptographic Technologies and Authentication
- 2-2 Network Security Design
- 2-3 Incident Response and Risk Management