Digital Signatures

Cryptographic proof of authenticity and integrity

🎯 Hook

💡 Intuition

📚 Theory

🎮 Playground

✏️ Practice

The Unforgeable Signature Challenge

How can you prove a message came from you - and that nobody changed it?

In the physical world, we sign documents with ink. But digital signatures are far more powerful - they can prove both who sent a message AND that it wasn't tampered with.

The Tamper-Proof Signature

A physical signature can be copied. A digital signature mathematically binds to the exact message content. Change even one character, and the signature becomes invalid!

Watch how Alice signs a bank transfer authorization, and see what happens when an attacker tries to modify the amount.

The Secret

The Secret

The Secret

The Secret

Digital Signatures

Cryptographic proof of authenticity and integrity

The Unforgeable Signature Challenge

How can you prove a message came from you - and that nobody changed it?

The Tamper-Proof Signature

Digital Signatures

Cryptographic proof of authenticity and integrity

The Unforgeable Signature Challenge

How can you prove a message came from you - and that nobody changed it?

The Tamper-Proof Signature