A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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should be used for questions regarding any split in the Bitcoin blockchain
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should be used for questions regarding public keys. A public key is the public half of the public/private keypair. Anyone can use a public key check that a signature is correct, but they can'…
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BIP32, or Hierarchical Deterministic Wallets. HD wallets are wallets that can be shared amongst different wallet implementation with or without the ability to spend coins. https://github.com/bitcoi…
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should be used for questions regarding Bitcoin Core development. This includes questions about the source code and development of Bitcoin Core.
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should be used for questions regarding the buying, selling or exchanging of Bitcoins or other cryptocurrencies for other currencies or commodities.
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leaked through cryptocurrency transactions or related processes, when subject to analysis and attempts of identification of sources and other properties.
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should be used for questions regarding the third Bitcoin testnet. The testnet is a network separate from the main Bitcoin network that allows developers to attempt modifications of the bitcoi…
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should be used for questions regarding difficulty which encodes the likelihood of one hash to succeed at mining a block. Indirectly, it is a measure of the total hashing power of all miners f…
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should be used for questions regarding digital signatures. A digital signature proves that the owner of a private key produced or endorsed a given message. These are used in transactions to p…
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not directly useful (like a commodity) but which can be used as a medium of exchange or a store of value. Essentially, money.
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for questions pertaining to the purchase of Bitcoins.
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The process of recovering lost bitcoins or private keys from a wallet/backup
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should be used for questions related to raw transactions, bitcoin transactions that have been serialized for network transmission.
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should be used for MultiBit, a now defunct lightweight Bitcoin client.
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refers to the rate at which two currencies are exchanged one-for-another.
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Questions concerned with (full) nodes, i.e. relay points in the Bitcoin network.
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the measuring unit of the processing power used to secure the Bitcoin network.
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should be used for questions regarding how Proof of Work works and Proof of Work algorithms. Proof of Work is a scheme where a 3rd party can verify that someone performed at least a certain a…
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A Java library for processing Bitcoin, stores blockchain headers only
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should be used for questions related to double spending. Double spends are when a money is spent more than one time. This is considered a form of fraud.
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Confirmations correspond to the number of blocks that are dependent on a given transaction. This includes the block containing that transaction and all blocks after it in the blockchain. The more conf…
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Collects technical details on the process of creating new addresses.
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an exchange popular in the early years of Bitcoin, where bitcoins could be traded against mora than a dozen national currencies including the US Dollar and the Euro. Insolvent in 2013.
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Concerning the broad subject of cryptography and its narrow application in Bitcoin protocol and applications.
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"Application-Specific Integrated Circuit" - An integrated circuit (chip) specifically designed for one task only. Similar to FPGAs, ASICs may be the low-power-consumption future of Bitcoin mining. As …
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should be used for questions referring to the company Coinbase and their services. DO NOT USE THIS TAG FOR COINBASE TRANSACTIONS.
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Nodes that fully verify all of the rules of Bitcoin. The most popular software implementation of full nodes is called Bitcoin Core.
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Regarding money transfers for different goods and services paid in Bitcoins.
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an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability.
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Refers to the process of checking the validity of transactions.
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created by transactions and allow the owner of an associated address to spent a specific amount.
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should be used for questions regarding wallet.dat files. A wallet.dat is a file used by Bitcoin Core which stores private keys and other information necessary to spend Bitcoin.
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off topic unless they are applicable to Bitcoin.
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off topic. A blockchain-based "smart contract" system with a Turing-complete contract programming language. Questions about Ethereum should be asked on the dedicated Et…
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Legal issues relating to the use of Bitcoins or similar crypto-currencies. This includes issues of legal compliance with legal areas such as taxation, money laundering, international currency controls…