A blockchain eclipse attack is a technique in which an attacker attempts to manipulate the network by creating false transactions and manipulating block distribution. Let's look at the key aspects of this type of attack, as well as methods for securing blockchain networks.
☄️ An eclipse attack, or “Eclipse attack,” involves an attacker isolating a node from legitimate network participants by convincing them that it is the only neighbor. This allows an attacker to control traffic to and from that node by rejecting or modifying transmitted information.
‼️ How does an eclipse attack manifest itself?
1️⃣ Node Isolation: The attacker creates a large number of its nodes in the network, surrounding the target node and providing it with a distorted picture of the network environment.
2️⃣ False Transactions: The attacker can then inject false transactions and blocks, convincing the node that they are genuine.
❎ How does the attack work?
An eclipse attack undermines the core principle of decentralization of blockchain networks by allowing an attacker to control and manipulate a node.
1️⃣ Balance Alteration: An attacker can alter account balances by making false transaction entries.
2️⃣ Denial of Service (DoS): This attack can also be used to cause a denial of service by removing a node from the actual network.
⚠️ How to protect yourself from an eclipse attack?
1️⃣ Leverage Diverse Nodes: Develop a network with diverse nodes to make it difficult for attackers to create a fake environment.
2️⃣ Verifying Transaction Signatures: Ensure that nodes on the network verify transaction and block signatures to prevent the injection of false data.
3️⃣ Use secure communication channels: Secure communication channels between nodes using encryption to prevent interception and modification of traffic.
4️⃣ Software Update: Regularly update blockchain node software to implement the latest security measures.
