California Computer Science

Lessons

1. Digital Citizenship and Cyber Hygiene

2. The ABCs of Cryptography

1. 2.1 Cryptography, Cryptology, Cryptanalysis

   • Lesson Plan
2. Description

   In this lesson, students will learn how basic encryption and decryption works. There is a need for secrecy when sending and receiving personal information. Encryption and decryption are used to protect personal information.

3. Objective

   Students will be able to:

   • Define cryptography, cryptology, and cryptanalysis
   • Explain the need for encryption and how basic encryption and decryption works
   • Relate encyption with how it affects the CIA Triad

4. 2.2 History of Cryptography

   • Lesson Plan
5. Description

   In this lesson, students will learn the history of cryptography. Humans have always had reasons to hide information, and throughout history they have used crypto systems of varying complexity to keep information safe.

6. Objective

   Students will be able to:

   • Explain the purpose of cryptography and how different crypto systems have been used throughout history

7. 2.3 Basic Crypto Systems: Caesar Cipher

   • Lesson Plan
8. Description

   In this lesson, students will learn and practice using the Caesar Cipher. The Caesar Cipher is an encryption method that predates computers in which each letter of the message is shifted by a certain amount, called the key.

9. Objective

   Students will be able to:

   • Encrypt and decrypt messages using the Caesar Cipher

10. 2.4 Basic Crypto Systems: Cracking Caesar

    • Lesson Plan
11. Description

    In this lesson, students will practice using brute force and letter frequency to crack the Caesar Cipher. The Caesar Cipher is an encryption method in which each letter of the message is shifted by a certain amount, called the key. Cracking the Caesar Cipher with brute force (trying every combination) is a trivial matter for modern computers.

12. Objective

    Students will be able to:

    • Explain why the Caesar Cipher is so easy for a computer to crack
    • Use basic letter distribution analysis to decrypt a simple message

13. 2.5 Basic Crypto Systems: Vigenere Cipher

    • Lesson Plan
14. Description

    In this lesson, students will learn and use the Vigenère Cipher. The Vigenère Cipher consists of several Caesar ciphers in sequence with different shift values based on a keyword, so brute force and letter frequency analysis do not work.

15. Objective

    Students will be able to:

    • Explain how the Vigenère Cipher works and why it is not as easy to crack as the Caesar Cipher

16. 2.6 The ABCs of Cryptography Quiz

    • Lesson Plan
17. Description
18. Objective

3. Programming With Karel

4. Karel Challenges

5. Networks and the Internet

6. JavaScript and Graphics

7. Graphics Challenges

8. JavaScript Control Structures

9. Control Structures Challenges

10. Functions, Events, and Lists

11. Final Project

12. Computer Science Careers

13. Extra Karel Practice

14. Extra Karel Puzzles

15. Functions and Parameters Practice

16. Animation and Games- Extended User Interaction

17. Extended Array Concepts

18. Extended Data Structures