Most hash functions weren’t built for zero-knowledge. They were designed for general-purpose computing — emails, files, password storage — not for proving things without revealing them.
Poseidon Hash changes that.
It’s a hash function born from the needs of privacy-first cryptography. Built from the ground up to work inside zero-knowledge proofs, Poseidon is lightweight, fast, and incredibly efficient in the one place that matters most: arithmetic circuits.
Standard hashes like SHA-256 or Keccak-512 are secure — but expensive inside zk-proofs. Every operation they perform has to be mimicked by the proof system, and that cost adds up fast.
Poseidon avoids that.
It’s designed to be friendly to Zero-Knowledge, meaning:
All while maintaining strong cryptographic guarantees.
Poseidon Hash is already powering some of the most advanced privacy tech in crypto — including zk-STARKs and zk‑Rollups — where every byte counts.
It’s also post-quantum safe, relying only on hashes — not elliptic curves or trapdoors — making it resilient even in a future with quantum computers.
In Xcoin, Poseidon plays a key role in the zero-knowledge stack, ensuring that every proof is both lightweight and future-proof.
Because of its efficiency, Poseidon makes it realistic to add full privacy even on constrained devices and low-fee networks. It lowers the barrier to private computation without sacrificing speed or clarity.
And because it’s open, audited, and flexible, developers can adapt it to a wide range of circuits, field sizes, and applications.