Binary & Hexadecimal Fundamentals
Convert between decimal, binary, and hex with confidence.
Welcome
Cryptography operates on bits and bytes. In this lesson we build fluency in binary and hexadecimal — the native languages of every encryption algorithm.
Why Binary?
Computers store everything as 0s and 1s. A bit is a single binary digit. A byte is 8 bits and holds values 0–255. All crypto operations happen at this level.
All lessons in this course
- Binary & Hexadecimal Fundamentals
- Modular Arithmetic Basics
- Prime Numbers & Factorization
- GCD, Euler's Totient & Number Theory Intro