NIP-49: Encrypted key backup foundations
Password-protected key backup needs a costly KDF, a complete encrypted format, and careful memory and key handling.
Implementation
Coax has a resumable scrypt foundation for NIP-49, bounded workspaces and independent vector checks. This page exercises its buffer-admission helper.
Example
The existing scrypt buffer-admission helper checks public fixture addresses and sizes. No password is derived.
What remains
The complete ncryptsec backup format, normalization, secret erasure and production approval are not established. This is a partial foundation.