Unlike version 3.0 (which required paired setup phases), introduces a lazy verification public key —a key that exists on a blockchain or distributed ledger but whose corresponding private key is never fully assembled by any single entity. Instead, it is fragmented using Shamir’s Secret Sharing (threshold t=3.5 → meaning 4-of-7 shares required).
| Property | zkAccess 3.5 | |----------|---------------| | Unforgeability | Reducible to BLS + SHA256 (under 3.5-threshold assumption) | | Privacy | Zero-knowledge – proof reveals nothing about attributes or shares | | Liveness | 3.5 ensures no single point of failure; 3 parties + time oracle required | | Post-quantum readiness | Not yet; uses elliptic curves (version 4.0 will migrate to lattice-based) | zk access 3.5 public key