bitcoin – an electronic payment system based on a distributed consensus mechanism and requiring no trusted intermediary in its use.

distributed denial of service attack (DDoS) – a type of cyberattack where a targeted machine is overwhelmed by fabricated network traffic, thus preventing legitimate users from accessing the service.

genesis block – the original block of transactions recorded in a cryptocurrency’s payment history.

public/private keypair – a cryptographic arrangement of information that allows for the secure signing of transactions and other data.