Public-Key Cryptography Concepts
Understand key pairs, public distribution, and private-key secrecy.
Welcome
Public-key cryptography solved the ancient key distribution problem. In this lesson we understand key pairs, public vs private keys, and the trust model.
The Key Distribution Problem
Before 1976, two parties needed to exchange a secret key before communicating securely. This required a secure channel — but if you had a secure channel, why encrypt at all?
All lessons in this course
- Public-Key Cryptography Concepts
- RSA Key Generation Step by Step
- RSA Encryption & Decryption Math
- RSA Real-World Use Cases & Key Sizes