Blockchain
Shared ledgers, digital ownership and trust without a middleman.
Cut through the hype to the mechanisms. Explain how a blockchain actually works and a tutor shows you where the idea holds and where it breaks down.
Understand the concepts
- How does blockchain consensus work?
Understand blockchain consensus through conflicting payments: transaction validity, shared ordering, fork choice, and why proof of work differs from proof of stake.
What you’ll learn
- How people agree on one record with no central owner
- What consensus, proof of work and proof of stake really do
- Where decentralisation helps, and what it costs
- Wallets, keys and what owning a token really means
Concepts you’ll explore
ConsensusProof of work/stakeHashingWallets & keysSmart contractsGas & feesForksThe trilemma
Try a question
How does a blockchain let people agree on a shared record without one central owner?
Answer this question →One free answer, instant feedback from an AI tutor, no account needed to start.