Bitcoin relies on cryptography every time someone spends BTC. When you send Bitcoin, your wallet doesn’t simply tell the network, “I own these coins.” Instead, your wallet uses a private key to create a digital signature that proves the transaction was authorized by the person who controls the corresponding key. For many years, Bitcoin used … Read more
If you’ve ever used a Bitcoin wallet, you’ve probably seen labels such as “Salary,” “Exchange,” “Savings,” or “Cold Storage.” These labels help you understand what your transactions and addresses represent. But what happens when you switch wallets? This is the problem BIP-329 tries to solve. BIP-329, formally called the Wallet Labels Export Format, proposes a … Read more
BIP322 is a Bitcoin standard for signing messages with Bitcoin addresses and scripts. It allows someone to prove that they can satisfy the spending conditions associated with a Bitcoin address without broadcasting an actual Bitcoin transaction. In simple terms, imagine someone asks: “Can you prove that you control this Bitcoin address?” Instead of sending them … Read more
Bitcoin is often described as a transparent financial network because its blockchain is public. But there is another part of Bitcoin that most beginners rarely think about: How do Bitcoin computers actually communicate with each other? Before BIP 324, Bitcoin’s peer-to-peer network mainly communicated using an unencrypted protocol known as P2P protocol version 1, or … Read more
Bitcoin gives anyone the ability to receive payments without asking a bank for permission. But there is a catch. Bitcoin’s blockchain is public. If you repeatedly receive Bitcoin at an address that everyone knows belongs to you, people may be able to connect your payments and build a picture of your financial activity. That’s why … Read more
Bitcoin addresses are designed to receive Bitcoin, but repeatedly publishing the same address can create privacy problems. If you use one Bitcoin address for every payment, anyone who can identify that address may be able to look at its transaction history on the public blockchain. This creates an interesting challenge. You want people to have … Read more
Bitcoin addresses are secure, but they are not exactly easy to remember. A typical Bitcoin address can look like a long string of letters and numbers that is difficult to type, read, or verify manually. This creates a problem for everyday payments: How can someone pay you without having to copy a long Bitcoin address … Read more
Sending Bitcoin normally means entering or scanning a Bitcoin address, choosing an amount, and reviewing the transaction before confirming it. But there is an easier way. You may have seen a Bitcoin QR code on a website, donation page, invoice, or payment screen. When you scan it with a compatible wallet, the wallet can automatically … Read more
Bitcoin transactions are public by design. Anyone can inspect the blockchain and see transaction details such as inputs, outputs, amounts, and the addresses or scripts involved. That transparency is useful, but it also creates privacy challenges. One of the most important examples is Bitcoin address reuse. If someone repeatedly receives Bitcoin using the same address, … Read more
Bitcoin is often described as digital money, but there is another important part of Bitcoin that beginners sometimes overlook: programmable spending conditions. Bitcoin does not simply ask, “Who owns these coins?” Instead, Bitcoin transactions can contain rules that determine what conditions must be satisfied before those coins can be spent. These rules are created using … Read more