Human Passport Takes Aim at Sybil Attacks on Base with New On-Chain Detection Suite

As Base booms into the fastest-growing Layer 2 on Ethereum, it’s also attracted a swarm of Sybil attackers—bad actors spinning up fake wallets to snag airdrops and game governance. Today, Human Passport (formerly Gitcoin Passport) unveiled a dedicated toolkit designed to verify real humans on Base, without slow, invasive KYC checks or awkward user flows.

At the heart of the launch is a new machine-learning–powered Sybil Detection Model, fine-tuned for Base’s transaction patterns. In real time, it sifts through wallet behaviors—spotting the telltale signs of sock-puppet accounts trying to game the system. Best of all, everything operates fully on-chain: users mint a “Stamp” of their humanity score directly on Base, bolstering transparency and trust.

Empowering Base with Privacy-Preserving Tech

The power of the system doesn’t stop there. Human Passport’s cross-chain scoring aggregates on-chain behavior from Base, Ethereum mainnet, and other EVM chains. It paints a fuller picture of each wallet’s legitimacy. That extra layer of intelligence has already paid dividends in the wild: protocols like LayerEdge and Story Protocol screened hundreds of thousands of wallets with Human Passport’s service. It protects the integrity of their airdrops and collectively saves millions in rewards that otherwise might have been siphoned off by bots.

“Base is exploding with activity, but where there’s growth, Sybils follow,” said Kyle Weiss, Co-Founder of Human Passport. “Communities die when rewards go to bots, but with Human Passport on Base, we’re making sure that never happens.”

This rollout builds on Human Passport’s evolution since its acquisition by human.tech six months ago. Now operating under the banner of a public-benefit tech company, human.tech is on a mission to craft privacy-preserving identity systems that empower individuals rather than platforms.

“Sybil resistance isn’t just about stopping bots, it’s about defending what it means to be human in a world where that definition is under siege,” added Shady El Damaty, CEO of human.tech. With more than 2 million users and over 35 million secure credentials issued to date, Human Passport has already protected upwards of $450 million in on-chain distributions for verifiable humans.

As governments and corporations increasingly explore digital IDs—often via surveillance, biometrics, or opaque algorithms—human.tech’s decentralized approach aims to preserve digital dignity and autonomy. In an era of deepfakes and forged identities, proving you’re human may well become one of the last lines of defense against a burgeoning digital dystopia.