Bitcoin wallets hold a user's keys, allowing them to sign transactions on the Bitcoin blockchain. Wallets also allow users to receive bitcoin and store it securely.
Blockchain is the technology that underpins Bitcoin and allows its users to exchange value without a central intermediary. A blockchain is a database containing the entire history of Bitcoin transactions.
A transaction is a transfer of Bitcoin value on the blockchain. Bitcoin transactions are irreversible once added to the blockchain.
Bitcoin is a peer-to-peer currency that is a network of nodes running Bitcoin software. A node is able to receive and communicate transaction information with other nodes in the Bitcoin network. Bitcoin nodes store and verify the blockchain.
A private key is used to verify ownership and sign transactions in order to send bitcoin. A private key can derive a public key.
The Lightning Network facilitates instant, near-feeless payments for Bitcoin. These payments happen on a secondary network instead of Bitcoin’s blockchain.
Bitcoin Core is the most popular version of the Bitcoin software. It powers almost all of the nodes on the Bitcoin network, allowing them to enforce the same ruleset and achieve consensus.
Cryptography is a field of math which encompasses a variety of different methods for maintaining digital security and privacy. Bitcoin uses cryptography in several ways to ensure its security.
Bitcoin has a variety of data types, most of which are represented by alphanumeric strings. These strings may seem indistinguishable at first, but each data type has a unique identifying marker.
A cold storage wallet has keys that never touch an internet-connected computer. Cold storage offers superior security at the cost of lower convenience.