Chapter 5 of 10 · Cryptography 50%

🔐 Google made two different PDFs share one SHA-1 hash, and Flame forged a Microsoft certificate the same way. Can you say exactly why a 'unique' fingerprint stopped being unique?

A hash is not encryption and you never decrypt it. You will watch the avalanche effect, tell a collision from a preimage, identify a hash with hashid, and forge a signature with length extension. HMAC is the fix. 🧩

Premium Chapter

Create a free account to access this chapter and start learning with hands-on labs.

Create Free Account

Ready to track your progress?

Create a free account to save your progress, earn XP, and access 170+ hands-on cybersecurity labs.

Start Learning Free

Course Progress

Track your learning journey

0 /10

0 % Complete

10 Remaining

Course Chapters

No chapters found for this filter

Cryptography

🔐 Google made two different PDFs share one SHA-1 hash, and Flame forged a Microsoft certificate the same way. Can you say exactly why a 'unique' fingerprint stopped being unique?

Premium Chapter

Ready to track your progress?

Course Progress

Course Chapters

Encoding and encryption

Substitution ciphers

The Vigenere cipher

XOR cryptanalysis

Hash functions and collisions

Block cipher modes

RSA fundamentals

RSA attacks

Key exchange and randomness

Cryptography in the wild