Zcash developer Zakura proposes one-time viewing keys to prevent quantum computers from linking shielded swaps

Zcash full node developer Zakura has proposed "one-time" viewing keys to prevent future quantum computers from linking a user's shielded Zcash payments. The fix targets swaps through NEAR Intents, where a user's shielded address is posted on NEAR's public chain. The approach requires no network upgrade and uses private information retrieval to avoid slowing down wallet restoration. If a quantum computer breaks one posted address, it will only learn about payments to that specific address, not others.