OverviewStart here2 min
Cryptography
Symmetric and asymmetric encryption, hashing and PKI.
About this module
Cryptography is the math that keeps data secret, proves it was not changed, and proves who sent it. This is the final module of the course. You will learn the two encryption families, hashing, cipher modes, PKI and certificates, disk encryption, how attackers try to break crypto, and where the field is heading (quantum, blockchain, AI). The big lesson: most breaches come from weak settings, not from broken math.
What you will learn
- Cryptography basics & key access
- Encryption algorithms (symmetric vs asymmetric)
- Hash functions & integrity
- Cipher modes & authenticated encryption
- PKI, certificates & secure email
- Disk encryption & crypto tools
- Cryptanalysis, attacks & key stretching
- Future crypto: quantum, lightweight, blockchain & AI
Module roadmap
01Cryptography Basics & Key AccessLesson 1 · ~4 min
02Encryption AlgorithmsLesson 2 · ~5 min
03Hash Functions & IntegrityLesson 3 · ~4 min
04Cipher Modes & Authenticated EncryptionLesson 4 · ~5 min
05PKI, Certificates & Secure EmailLesson 5 · ~5 min
06Disk Encryption & Crypto ToolsLesson 6 · ~4 min
07Cryptanalysis & Key StretchingLesson 7 · ~4 min
08Future Crypto: Quantum, Blockchain & AILesson 8 · ~4 min
09AssessmentAssessment · ~5 min
How to study: read each lesson in order, answer the two "Check yourself" questions, then take the practice test and aim for 80%+. Only practice cracking on your own lab data.