Neuron Encrypt

Neuron Encrypt is a local file encryption app that keeps your files private. No accounts, no internet, no cloud — everything happens on your device.

Security

• AES-256-GCM-SIV (RFC 8452) — nonce-misuse resistant authenticated encryption

• Argon2id key derivation (256 MiB memory cost) — GPU/ASIC resistant

• HKDF-SHA512 key expansion with per-version domain separation

• VAULTX04 format with authenticated header (AAD on every chunk)

• 100% Safe Rust core — zero unsafe blocks in the crypto library

• Zero internet permissions, zero storage permissions (uses SAF)

• Keys and plaintext wiped from RAM with Zeroizing on drop

Features

• Encrypt any file to a .vx2 container

• Decrypt .vx2 files back to original

• Batch processing — queue multiple files with one passphrase

• Auto-detects encrypt vs decrypt mode from file magic bytes

• Cancel mid-operation (within one 1 MiB chunk)

• Password strength meter

• Secure wipe original file after encryption (with confirmation)

• Open source (GPLv3)

How it works

1. Select a file (or drop one from your file manager)

2. Enter a strong passphrase

3. Tap ENCRYPT — your file is encrypted to .vx2 beside the original

4. Optionally wipe the original file

Your passphrase never leaves the device. There is no recovery — if you forget the passphrase, your files are gone. This is by design.

Privacy