The Sybil System is a concept in computer science and cybersecurity that addresses the problem of identity verification in decentralized networks. It refers to a situation where a single entity creates multiple fake identities, or "Sybil nodes," to gain disproportionate influence over a network. This can undermine the integrity of systems like blockchain and peer-to-peer networks. To combat the Sybil attack, various mechanisms are employed, such as proof-of-work and proof-of-stake, which require users to demonstrate their commitment to the network. These methods help ensure that each participant has a legitimate stake, making it difficult for a single entity to control multiple identities and disrupt the system's functionality.