A cyberattack directed at an Internet service provider that aims to reduce uptime or prevent users from accessing a web-enabled system like a blockchain.
Using routing attacks, an attacker can split a network into two (or more) separate parts. The attacker prevents communication between nodes that are a part of one chain and those that are not. The attacker builds rival blockchains in this manner. All blocks mined within the shorter chain are discarded once the attack is complete. The revenues of the miners are also discarded, along with any transactions.
