Bitcoin Academy

Bitcoin Academy

What Is Replace-By-Fee (RBF) in Bitcoin?

Replace-By-Fee (RBF) lets a sender replace an unconfirmed Bitcoin transaction with a version paying a higher fee, useful…

Bitcoin Academy

What Is a Bitcoin Confirmation? Why Do They Matter?

A confirmation counts how many blocks have been mined since a Bitcoin transaction was included, with each additional…

Bitcoin Academy

What Is the UTXO Model? How Bitcoin Tracks Balances

The UTXO model is how Bitcoin tracks ownership: instead of account balances, the ledger consists of discrete Unspent…

Bitcoin Academy

What Is a Multisig Wallet? How Multi-Signature Works

A multisig wallet requires multiple private keys (an M-of-N setup, like 2-of-3) to authorize a transaction, so losing…

Bitcoin Academy

What Are Bitcoin Script and Smart Contracts?

Bitcoin Script is the built-in programming language defining exactly how coins can be spent, deliberately limited (no loops)…

Bitcoin Academy

What Is the Taproot Upgrade?

Taproot is a 2021 Bitcoin upgrade combining Schnorr signatures and MAST so complex multi-party transactions can look identical…

Bitcoin Academy

What Is SegWit? Bitcoin’s Segregated Witness Upgrade

SegWit is a 2017 Bitcoin upgrade that separated signature data from transaction data, effectively fitting more transactions into…

Bitcoin Academy

What Happens During a 51% Attack?

A 51% attack is when a miner or group controls a majority of Bitcoin's hash rate, potentially enabling…

Bitcoin Academy

What Is Bitcoin’s Longest Chain Rule?

The longest chain rule tells every Bitcoin node to follow whichever competing chain represents the most accumulated Proof…

Bitcoin Academy

What Is a Mining Pool?

A mining pool lets many miners combine computing power and split block rewards proportionally, using a share system…