xeronpmjs.com/package/lvthn
v1.3.1 with cli worker pooling & wasm simd optimization!
bun i -g lvthn # or npm install
lvthn keygen --armor -o my.key
cat secret.txt | lvthn encrypt -k my.key --armor > secret.enc
supports: serpent-256 (ctr mode w/ hmac-sha256) & xchacha20-poly1305
---
key derivation: scrypt (N=32768, r=8, p=1) for passphrases → 32-byte master key with a fresh random 32-byte salt per encryption.
integrity: any modification to a ciphertext chunk causes that chunk's authentication to fail. The entire decryption is rejected with no partial plaintext produced.
parallelism: encryption and decryption distribute 64KB chunks across a worker pool sized to hardwareConcurrency. Each worker owns an isolated WASM instance with no shared memory between workers.
4-wide inter-block SIMD (encryptChunk_simd): each v128 register lane holds word w from a different block (counters ctr, ctr+1, ctr+2, ctr+3). Same parallelism model as ChaCha20 CTR-4.
