An eclipse attack is a type of attack that targets a blockchain network by isolating and surrounding a specific node or a group of nodes within the network, in order to control and manipulate their communication with the rest of the network.
During an eclipse attack, the attackers may attempt to control the targeted node's communication, block its access to other nodes, and even manipulate the information that is being transmitted. This can allow the attackers to double-spend their digital assets or launch other malicious activities that can harm the network's integrity.
Eclipse attacks are a significant threat to decentralized systems like blockchain, as they can compromise the network's security and cause significant financial losses for users. To prevent such attacks, blockchain networks usually implement various security measures, such as firewalls, encryption, and multi-factor authentication.
It's worth noting that an eclipse attack is different from a 51% attack, where an attacker gains control of the majority of the network's computing power. In an eclipse attack, the attacker does not need to control the majority of the network's computing power; instead, they isolate and manipulate a targeted node or group of nodes to carry out the attack.