Idena addresses key challenges in the Ethereum ecosystem, particularly Sybil attacks and centralization risks, by introducing a Proof-of-Personhood protocol. Idena’s sublinear identity staking ensures that users with smaller stakes receive higher rewards, promoting decentralization and preventing the dominance of wealthy participants. Unlike many identity-based solutions, Idena preserves user privacy by verifying identities without exposing personal data. This combination of PoP and privacy protection offers a more decentralized and user-friendly alternative to existing identity solutions.