hsynchronous-fs

Post-quantum filesystem encryption

Post-Quantum filesystem encryption using a hybrid encryption protocol "hsynchronous"

❯ hsynchronous-fs --help
  Usage: src [options] [command]

  Commands:
    help     Display help
    version  Display version

  Options:
    -d, --drive [value]  The Drive letter to mount to (defaults to "A")
    -f, --file [value]   The input and output file that holds your encrypted data (defaults to "./encrypted")
    -h, --help           Output usage information
    -k, --key            The key file path
    -v, --version        Output the version number

Official Rating: NIST Level 4 (Highest commercial/government grade with post-quantum resistance)

Component	Algorithm/Strength	Security Level	Notes
Key Encapsulation (KEM)	ML-KEM-1024 (Kyber)	NIST Level 3 (PQC Standard)	Post-quantum secure, IND-CCA2
Digital Signature	Falcon-1024	NIST Level 3 (PQC Standard)	Post-quantum secure, EUF-CMA
Symmetric Encryption	AES-256-GCM	256-bit (NIST-approved)	Quantum-resistant key size, provides confidentiality + integrity
Key Derivation	HKDF-SHA256	256-bit (NIST SP 800-56C)	Proper key separation with context binding
Random Number Generation	crypto.randomBytes()	Cryptographically secure (CSPRNG)	Uses OS entropy source

Resistance Against Attacks

Attack Type	Protection Mechanism	Additional Notes
Quantum computing	ML-KEM-1024 (IND-CCA2) + Falcon-1024 (EUF-CMA)	Full PQC resistance
MITM attacks	Falcon-1024 signatures + protocol binding	Non-repudiation
Key compromise	Ephemeral KEM keys (per message) + HKDF with unique salts	No long-term key reuse
Replay attacks	64-byte random salts + 12-byte IVs (2¹²⁸ uniqueness)	Statistically negligible collision risk
CRIME/BREACH	No compression (removed in v2) + encryption before any encoding	Mitigates compression oracles
Key derivation attacks	HKDF-SHA256 with protocol-specific info binding	Prevents cross-context reuse
Timing attacks	timingSafeEqual + constant-time HMAC (padded inputs)	Resists timing leaks
Memory scraping	Explicit secureZero for sensitive buffers	Prevents cold-boot attacks
Error oracles	Unified error paths (generic "decryption failed" messages)	Hides cryptographic faults
Side-channel leaks	Minimum processing time (MIN_PROCESSING_TIME)	Obscures operation timing
Metadata leakage	Fixed block padding (1024-byte chunks)	Hides true message size

Benchmarking

clk: ~2.51 GHz
cpu: 13th Gen Intel(R) Core(TM) i5-13420H
runtime: node 22.13.1 (x64-win32)

benchmark                   avg (min … max) p75 / p99
------------------------------------------- ---------
GenKeys                       47.33 ms/iter  53.51 ms 
                      (35.52 ms … 64.85 ms)  58.01 ms 
                    (  2.71 kb …  20.49 kb)   4.53 kb 

Encrypt                       13.08 ms/iter  14.28 ms 
                       (9.73 ms … 25.82 ms)  24.94 ms
                    ( 23.41 kb …  39.29 kb)  24.86 kb

Decrypt                      622.42 µs/iter 878.20 µs
                      (259.30 µs … 2.62 ms)   1.87 ms
                    (472.00  b … 493.76 kb)  16.20 kb

• Protocol/version mismatch
• Unsupported algorithms detected
• Malformed key data