Blockchain Tampering Demo

Blockchain Immutability Visualization

This demonstration shows how blockchain technology creates an immutable chain of records. Try changing data in any block to see how it affects subsequent blocks in the chain.

Interactive Blockchain Demo

Try changing the BTC amount in any block to see how it affects the entire chain

⚠️ Blockchain has been tampered with!

Block #1

Invalid!
Txn: Alice sends 5 BTC to Bob
BTC
🔗 Technical Details ▶
0000

Block #2

Invalid!
Txn: Bob sends 3 BTC to Charlie
BTC
🔗 Technical Details ▶
None

Block #3

Invalid!
Txn: Charlie sends 1 BTC to Dave
BTC
🔗 Technical Details ▶
None

Block #4

Invalid!
Txn: Dave sends 2 BTC to Eve
BTC
🔗 Technical Details ▶
None

Block #5

Invalid!
Txn: Eve sends 4 BTC to Frank
BTC
🔗 Technical Details ▶
None

🎓 How Blockchain Security Works:

1. Each block contains transaction data and links to the previous block via its hash
2. When you change data in a block, its hash changes immediately
3. This breaks the chain of hashes, making all subsequent blocks invalid (shown in red)
4. Click "Recalculate All Hashes" to fix the chain (simulating the work miners do)
5. In a real blockchain, tampering would require recalculating all subsequent blocks faster than the network - which is practically impossible!

How to use this in your lessons

To add this visualizer to any course lesson, simply add the following comment tag in your Markdown content:

<!-- BLOCKCHAIN_VISUALIZER -->

This tag will be automatically replaced with the interactive blockchain visualizer component.