A "Dash Attack" is a type of cyber-attack that targets online payment systems, specifically those using digital currencies such as Bitcoin or Ethereum. The goal of this kind of attack is to disrupt the normal functioning of these systems by overwhelming them with numerous small transactions, known as "DDoS" (Distributed Denial-of-Service) attacks. These attacks can cause delays in processing payments and even prevent users from making transactions altogether. The term "dash attack" specifically refers to this type of cybercrime targeting digital currencies that use the Dash protocol, which is an open-source cryptocurrency based on Bitcoin.