Sybil Attack

A Sybil attackA Sybil attack is a security threat in peer-to-peer networks where a single adversary controls multiple nodes, known as Sybil nodes. The attacker creates multiple... More is a security threat in peer-to-peerPeer-to-peer (P2P) is a type of network where computers or nodes can directly communicate with each other, without the need for a central server or... More networks where a single adversary controls multiple nodes, known as Sybil nodes. The attacker creates multiple pseudonymous identities to gain a disproportionately large influence on the network. In the context of blockchainThe blockchain is a digital ledger that records transactions in a secure and decentralized manner. Think of it like a shared spreadsheet that is constantly... More, a Sybil attack can disrupt the consensus mechanism, which is crucial for maintaining the integrity and security of the blockchain network.

In a Sybil attack, the attacker creates multiple false identities (nodes) in the network. These nodes can then be used to carry out various malicious activities, such as double-spending in a cryptocurrencyCryptocurrency is a digital or virtual currency that uses cryptography for security and operates independently of a central bank. Cryptocurrencies use decentralized technology called blockchain... More network or manipulating the consensus mechanism in a blockchain network. The attacker can also use these nodes to disrupt the network’s operations or to gain an unfair advantage, such as miningCrypto mining is the process of validating transactions and creating new units of cryptocurrency through solving complex cryptographic puzzles using computer hardware. Anyone with access... More more blocks in a Proof of Work (PoW)Proof of work is a consensus mechanism used in blockchain networks that allows miners to compete to validate transactions and earn rewards by solving complex... More system.