Zcash Builder Zakura Proposes Per-Swap Viewing Keys to Close a Quantum Privacy Gap
By Unchained
AI summary of the source article
Zcash software builder Zakura has proposed a design providing per-swap viewing keys for NEAR Intents swaps. The design aims to limit what future quantum computers running Shor's algorithm could expose from published shielded addresses.
Why it matters
Zakura's Adam Tucker stated that until Zcash's planned Tachyon upgrade arrives, "a single published shielded address lets a quantum attacker link every payment that address’s key has ever received."
Key facts
- Zakura published a design giving each shielded address in a NEAR Intents swap its own viewing key, which is currently in review and not yet shipped.
- Under current mechanisms, each Zcash shielded account relies on a single incoming viewing key behind all its addresses, which a quantum computer could potentially exploit.
- The proposed design derives a fresh key for each swap from a hashed index while keeping the spending key the same.
Source excerpt · Unchained
The design, still in review, would give each shielded address posted during a NEAR Intents swap its own key, so a future quantum attacker who breaks one sees only that swap. The post Zcash Builder Zakura Proposes Per-Swap Viewing Keys to Close a Quantum Privacy Gap appeared first on Unchained .