Quantum Purse key vault

This module provides a secure authentication interface for managing SPHINCS+ cryptographic keys in QuantumPurse project using Rust and WebAssembly.

Feature list:

Feature	Details
Signature type	SPHINCS+
Store model	Indexed DB
Mnemonic standard	Custom BIP39 English
Local encryption	AES256
Key derivation	Scrypt
Authentication	Password
Password hashing	Scrypt

Custom BIP39

SPHINCS+ offers 12 parameter sets, grouped by three security parameters: 128-bit, 192-bit, and 256-bit. These require seeds of 48 bytes, 72 bytes, and 96 bytes respectively, used across key generation and signing.

This library introduces a custom BIP39 mnemonic backup format for each security parameter of SPHINCS+ as below:

SPHINCS+ security parameter	BIP39 level	Word count
128 bit ~ 48 bytes	3*16byte	3*12 = 36 words
192 bit ~ 72 bytes	3*24byte	3*18 = 54 words
256 bit ~ 96 bytes	3*32byte	3*24 = 72 words

Dependency

• Rust & Cargo
• Wasm-pack
• Npm

Build

# init submodule quantum-resistant-lockscript
git submodule update --init

# run build script
./build.sh

# test
cargo test

Package and publish

cd dist
npm pack
npm login
npm publish