noble-post-quantum

Auditable & minimal JS implementation of public-key post-quantum cryptography.

🔒 Auditable
🔻 Tree-shakeable: unused code is excluded from your builds
🔍 Reliable: tests ensure correctness
🦾 ML-KEM & CRYSTALS-Kyber: lattice-based kem from FIPS-203
🔋 ML-DSA & CRYSTALS-Dilithium: lattice-based signatures from FIPS-204
🐈 SLH-DSA & SPHINCS+: hash-based signatures from FIPS-205
🪶 77KB (15KB gzipped) for everything with hashes

Take a glance at GitHub Discussions for questions and support.

[!IMPORTANT] NIST published IR 8547, prohibiting classical cryptography (RSA, DSA, ECDSA, ECDH) after 2035. Take it into an account while designing a new cryptographic system.

This library belongs to noble cryptography

noble cryptography — high-security, easily auditable set of contained cryptographic libraries and tools.

Zero or minimal dependencies
Highly readable TypeScript / JS code
PGP-signed releases and transparent NPM builds
All libraries: ciphers, curves, hashes, post-quantum, 4kb secp256k1 / ed25519
Check out homepage for reading resources, documentation and apps built with noble

Usage

npm install @noble/post-quantum

We support all major platforms and runtimes. For Deno, ensure to use npm specifier. For React Native, you may need a polyfill for getRandomValues. A standalone file noble-post-quantum.js is also available.

// import * from '@noble/post-quantum'; // Error: use sub-imports instead
import { ml_kem512, ml_kem768, ml_kem1024 } from '@noble/post-quantum/ml-kem';
import { ml_dsa44, ml_dsa65, ml_dsa87 } from '@noble/post-quantum/ml-dsa';
import {
  slh_dsa_sha2_128f, slh_dsa_sha2_128s,
  slh_dsa_sha2_192f, slh_dsa_sha2_192s,
  slh_dsa_sha2_256f, slh_dsa_sha2_256s,
  slh_dsa_shake_128f, slh_dsa_shake_128s,
  slh_dsa_shake_192f, slh_dsa_shake_192s,
  slh_dsa_shake_256f, slh_dsa_shake_256s,
} from '@noble/post-quantum/slh-dsa';
// import { ml_kem768 } from 'npm:@noble/post-quantum@0.1.0/ml-kem'; // Deno

ML-KEM / Kyber
ML-DSA / Dilithium
SLH-DSA / SPHINCS+
What should I use?
Security
Speed
Contributing & testing
Resources
License

ML-KEM / Kyber shared secrets

import { ml_kem512, ml_kem768, ml_kem1024 } from '@noble/post-quantum/ml-kem';
// [Alice] generates secret & public keys, then sends publicKey to Bob
const aliceKeys = ml_kem768.keygen();
const alicePub = aliceKeys.publicKey;

// [Bob] generates shared secret for Alice publicKey
// bobShared never leaves [Bob] system and is unknown to other parties
const { cipherText, sharedSecret: bobShared } = ml_kem768.encapsulate(alicePub);

// Alice gets and decrypts cipherText from Bob
const aliceShared = ml_kem768.decapsulate(cipherText, aliceKeys.secretKey);

// Now, both Alice and Both have same sharedSecret key
// without exchanging in plainText: aliceShared == bobShared

// Warning: Can be MITM-ed
const carolKeys = kyber1024.keygen();
const carolShared = kyber1024.decapsulate(cipherText, carolKeys.secretKey); // No error!
notDeepStrictEqual(aliceShared, carolShared); // Different key!

Lattice-based key encapsulation mechanism, defined in FIPS-203.

See website and repo. There are some concerns with regards to security: see djb blog and mailing list. Old, incompatible version (Kyber) is not provided. Open an issue if you need it.

[!WARNING] Unlike ECDH, KEM doesn't verify whether it was "Bob" who've sent the ciphertext. Instead of throwing an error when the ciphertext is encrypted by a different pubkey, decapsulate will simply return a different shared secret. ML-KEM is also probabilistic and relies on quality of CSPRNG.

ML-DSA / Dilithium signatures

import { ml_dsa44, ml_dsa65, ml_dsa87 } from '@noble/post-quantum/ml-dsa';
const seed = new TextEncoder().encode('not a safe seed');
const aliceKeys = ml_dsa65.keygen(seed);
const msg = new Uint8Array(1);
const sig = ml_dsa65.sign(aliceKeys.secretKey, msg);
const isValid = ml_dsa65.verify(aliceKeys.publicKey, msg, sig);

Lattice-based digital signature algorithm, defined in FIPS-204. See website and repo. The internals are similar to ML-KEM, but keys and params are different.

SLH-DSA / SPHINCS+ signatures

import {
  slh_dsa_sha2_128f, slh_dsa_sha2_128s,
  slh_dsa_sha2_192f, slh_dsa_sha2_192s,
  slh_dsa_sha2_256f, slh_dsa_sha2_256s,
  slh_dsa_shake_128f, slh_dsa_shake_128s,
  slh_dsa_shake_192f, slh_dsa_shake_192s,
  slh_dsa_shake_256f, slh_dsa_shake_256s,
} from '@noble/post-quantum/slh-dsa';

const aliceKeys = sph.keygen();
const msg = new Uint8Array(1);
const sig = sph.sign(aliceKeys.secretKey, msg);
const isValid = sph.verify(aliceKeys.publicKey, msg, sig);

Hash-based digital signature algorithm, defined in FIPS-205. See website and repo. We implement spec v3.1 with FIPS adjustments. Some wasm libraries use older specs.

[!NOTE] SLH-DSA is slow: see benchmarks below

What should I use?

	Speed	Key size	Sig size	Created in	Popularized in	Post-quantum?
RSA	Normal	256B - 2KB	256B - 2KB	1970s	1990s	No
ECC	Normal	32 - 256B	48 - 128B	1980s	2010s	No
ML-KEM	Fast	1.6 - 31KB	1KB	1990s	2020s	Yes
ML-DSA	Normal	1.3 - 2.5KB	2.5 - 4.5KB	1990s	2020s	Yes
SLH-DSA	Slow	32 - 128B	17 - 50KB	1970s	2020s	Yes

We suggest to use ECC + ML-KEM for key agreement, SLH-DSA for signatures.

ML-KEM and ML-DSA are lattice-based, so they're less "proven". There's some chance of advancement, which will break this algorithm class. SLH-DSA, while being slow, is built on top of older, conservative primitives.

Symmetrical algorithms like AES and ChaCha (available in noble-ciphers) suffer less from quantum computers. For AES, simply update from AES-128 to AES-256.

Security

The library has not been independently audited yet.

There is no protection against side-channel attacks. Keep in mind that even hardware versions ML-KEM are vulnerable.

If you see anything unusual: investigate and report.

Speed

Noble is the fastest JS implementation of post-quantum algorithms. WASM libraries can be faster.

OPs/sec	Keygen	Signing	Verification	Shared secret
ECC ed25519	10270	5110	1050	1470
ML-KEM-768	2300			2000
ML-DSA44	670	120	620
SLH-DSA-SHA2-128f	250	10	167

For SLH-DSA, SHAKE slows everything down 8x, and -s versions do another 20-50x slowdown.

Detailed benchmarks on Apple M2:

ML-KEM
keygen
├─ML-KEM-512 x 3,784 ops/sec @ 264μs/op
├─ML-KEM-768 x 2,305 ops/sec @ 433μs/op
└─ML-KEM-1024 x 1,510 ops/sec @ 662μs/op
encrypt
├─ML-KEM-512 x 3,283 ops/sec @ 304μs/op
├─ML-KEM-768 x 1,993 ops/sec @ 501μs/op
└─ML-KEM-1024 x 1,366 ops/sec @ 731μs/op
decrypt
├─ML-KEM-512 x 3,450 ops/sec @ 289μs/op
├─ML-KEM-768 x 2,035 ops/sec @ 491μs/op
└─ML-KEM-1024 x 1,343 ops/sec @ 744μs/op

ML-DSA
keygen
├─ML-DSA44 x 669 ops/sec @ 1ms/op
├─ML-DSA65 x 386 ops/sec @ 2ms/op
└─ML-DSA87 x 236 ops/sec @ 4ms/op
sign
├─ML-DSA44 x 123 ops/sec @ 8ms/op
├─ML-DSA65 x 120 ops/sec @ 8ms/op
└─ML-DSA87 x 78 ops/sec @ 12ms/op
verify
├─ML-DSA44 x 618 ops/sec @ 1ms/op
├─ML-DSA65 x 367 ops/sec @ 2ms/op
└─ML-DSA87 x 220 ops/sec @ 4ms/op

SLH-DSA
keygen
├─slh_dsa_sha2_128f x 245 ops/sec @ 4ms/op
├─slh_dsa_sha2_192f x 166 ops/sec @ 6ms/op
├─slh_dsa_sha2_256f x 64 ops/sec @ 15ms/op
├─slh_dsa_shake_128f x 35 ops/sec @ 28ms/op
├─slh_dsa_shake_192f x 23 ops/sec @ 41ms/op
├─slh_dsa_shake_256f x 9 ops/sec @ 110ms/op
├─slh_dsa_sha2_128s x 3 ops/sec @ 257ms/op
├─slh_dsa_sha2_192s x 2 ops/sec @ 381ms/op
└─slh_dsa_sha2_256s x 3 ops/sec @ 250ms/op
sign
├─slh_dsa_sha2_128f x 10 ops/sec @ 94ms/op
├─slh_dsa_sha2_192f x 6 ops/sec @ 163ms/op
├─slh_dsa_sha2_256f x 2 ops/sec @ 338ms/op
├─slh_dsa_shake_128f x 1 ops/sec @ 671ms/op
├─slh_dsa_shake_192f x 0 ops/sec @ 1088ms/op
├─slh_dsa_shake_256f x 0 ops/sec @ 2219ms/op
├─slh_dsa_sha2_128s x 0 ops/sec @ 1954ms/op
├─slh_dsa_sha2_192s x 0 ops/sec @ 3789ms/op
└─slh_dsa_sha2_256s x 0 ops/sec @ 3404ms/op
verify
├─slh_dsa_sha2_128f x 162 ops/sec @ 6ms/op
├─slh_dsa_sha2_192f x 111 ops/sec @ 9ms/op
├─slh_dsa_sha2_256f x 105 ops/sec @ 9ms/op
├─slh_dsa_shake_128f x 24 ops/sec @ 40ms/op
├─slh_dsa_shake_192f x 17 ops/sec @ 58ms/op
├─slh_dsa_shake_256f x 16 ops/sec @ 59ms/op
├─slh_dsa_sha2_128s x 495 ops/sec @ 2ms/op
├─slh_dsa_sha2_192s x 293 ops/sec @ 3ms/op
└─slh_dsa_sha2_256s x 220 ops/sec @ 4ms/op

Contributing & testing

Clone the repository
npm install to install build dependencies like TypeScript
npm run build to compile TypeScript code
npm run test will execute all main tests

Resources

Check out paulmillr.com/noble for useful resources, articles, documentation and demos related to the library.

License

The MIT License (MIT)

See LICENSE file.