Cryptography is a method of protecting information and communications through the use of codes, so that only those for whom the information is intended can read and process it. The prefix "crypt-" means "hidden" or "vault" -- and the suffix "-graphy" stands for "writing."

In computer science, cryptography refers to secure information and communication techniques derived from mathematical concepts and a set of rule-based calculations called algorithms, to transform messages in ways that are hard to decipher. These deterministic algorithms are used for cryptographic key generation, digital signing, verification to protect data privacy, web browsing on the internet, and confidential communications such as credit card transactions and emai.

Concepts you will learn here.

1. Understanding Confidentiality, Integrity and Authenticity

2. How encryption and decryption works

3. Symmetric and Asymmetric encryption

4. RSA key exchange

5. Diffie Hellman key exchange

6. Digital Signature

7. What is Certificate Authority and Making Linux machine a CA.

8. How encryption works on HTTPS site works with DH and CA

9. Squid Proxy Server

10. HTTPS Inspection or SSL Interception

11. Practicing URL filtering, File Blocking on Proxy Server

12. How encryption and decryption works with Practical Labs

13. Symmetric and Asymmetric encryption with Practical Labs

14. RSA key exchange with Practical Labs

15. Diffie Hellman key exchange with Practical Labs

16. Digital Signature with Practical Labs

17. Squid Proxy Server with Practical Labs

18. Installing and Configuring Squid Proxy Server - Explicit Proxy

19. HTTPS Inspection or SSL Interception with Practical Labs

20. Practicing URL filtering, File Blocking on Proxy Server