K33P | Devpost

Inspiration

Yes, crypto is about freedom, but that freedom is fragile. Every year, over 15% of users lose access to their crypto wallets, not to hackers, but to forgotten or misplaced seed phrases. This silent crisis has already cost billions in lost assets. We built K33P to stop that from happening.

What it does

K33P is a self-custody digital safe where access is controlled by digital signatures. It allows users to securely store seed phrases, biometric data, and personal identifiers in a privacy-first, user-owned vault.

How we built it

By combining advanced encryption (AES-256), biometric security (Face ID), OTP/PIN-based multi-factor authentication, and blockchain technologies, digital signatures, and zero-knowledge proofs, K33P ensures that users retain full ownership and control of their sensitive data, without the fragility of paper backups.

Challenges we ran into

1 - Designing a secure user experience that balances convenience with multi-layered protection. 2 - Implementing account DID identification in a way that’s both efficient and device-agnostic. On-chain 3 - Integrating decentralized storage (via Iagon) while maintaining verifiability through blockchain anchoring. 4 - Coordinating privacy-preserving recovery flows without sacrificing security or usability.

Accomplishments that we're proud of

K33P was awarded 1st runner-up at the Sandbox 2025 Hackathon, validating our approach to solving one of crypto’s most persistent problems.

What we learned

1 - Privacy and usability can coexist when user experience is deeply considered at the protocol level. 2 - Self-custody doesn’t have to be intimidating, users will adopt secure habits if the tools are intuitive.