Academy Lesson attack-51-percent

Summary

Majority hash power attack enabling censorship and deep history rewrites.

Security Notes

Cannot forge coins or break signatures, but can reorder recent history

Node Security Panel

Vulnerabilities (0)

Attacks (0)

Assumptions (0)

Policy vs Consensus (0)

Graph Neighbors

Direction	Relation	Node
Outgoing	STRENGTHENS	Reorg
Outgoing	WEAKENS	Probabilistic Finality
Outgoing	EXPLOITS	Proof of Work
Outgoing	EXPLOITS	Difficulty Target
Outgoing	EXPLOITS	Reorg
Outgoing	DEPENDS_ON	Hashpower Majority Assumption
Outgoing	WEAKENS	Immutability
Outgoing	MITIGATED_BY	Decentralized Hash Distribution
Incoming	WEAKENS	Decentralized Hash Distribution

Related Nodes

Journey Progress

Shared progress sync across Home, Sidebar, and Academy.

Lesson 1/80% complete

This node is not part of the guided sequence.

Node status: Not completed

Current Guided Lesson

What is Bitcoin?

0 of 8 lessons completed.

Open Home Journey

Glossary

Hover the headers for quick tooltips, then read the short canonical distinction.

Pseudonymity vs Anonymity

Bitcoin is pseudonymous: addresses are public identifiers without built-in real names, but flows can still be traced and clustered.

Nodes vs Miners

Nodes enforce consensus rules by validating blocks/transactions. Miners order transactions into blocks and compete in proof-of-work.

Wallets vs Keys

Wallets store and manage cryptographic keys used to sign spends. The bitcoin itself exists as UTXOs on the blockchain state.

Base Layer vs Lightning

Bitcoin base layer optimizes final settlement and security. Lightning optimizes speed and cost for day-to-day payment flow.

Bitcoin Academy Learning Paths

Structured concept nodes connect blocks, transactions, mempool policy, mining incentives, and security models into guided journeys you can resume anytime.

Each node links to live explorer modules and labs so theory maps directly to observable mainnet behavior.

Frequently asked questions

Is Academy content available in Spanish?
Yes. Toggle to /es/academy for mirrored research and academy nodes where translations exist.
How are Academy nodes verified?
Nodes include verification timestamps and cross-links to primary protocol references where applicable.