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xero edited this page May 30, 2026 · 4 revisions
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Benchmarks

SIMD performance results across V8, SpiderMonkey, and JavaScriptCore.

Benchmark Description
serpent_simd_bench Serpent-256 CTR and CBC-decrypt, scalar vs 4-wide SIMD across all three engines
chacha_simd_bench ChaCha20 4-wide inter-block parallelism, scalar vs SIMD, including documented negative result for intra-block approach
p256_perf ECDSA-P256 math-level optimizations: Strauss-Shamir verify, windowed-then-safegcd scalarInv, Comba feSqr investigated and rejected by measurement. ecdsaSign -73%, ecdsaVerify -87% versus baseline.

Cross-References

Document Description
index Project Documentation index
architecture Repository structure, build and CI, WASM modules, public API, test suite, and security posture

© MMXXVI: Leviathan Crypto Library

GitHub Release npm package minimized gzipped size demos

simd webassembly side-effect free tree-shakeable zero dependencies MIT Licensed

Leviathan-Crypto Wiki

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Getting Started

Authenticated Encryption

Digital Signatures

Ciphers

  • Serpent-256 TypeScript | WASM
    • Serpent, SerpentCtr, SerpentCbc, SerpentGenerator
  • ChaCha20 TypeScript | WASM
    • ChaCha20, Poly1305, ChaCha20Poly1305, XChaCha20Poly1305, ChaCha20Generator
  • AES TypeScript | WASM
    • AES, AESCbc, AESCtr, AESGCM, AESGCMSIV, AESGenerator

Signature Primitives

  • ML-DSA TypeScript | WASM
    • pure (FIPS 204): MlDsa44, MlDsa65, MlDsa87
    • pure-mode suites: MlDsa44Suite, MlDsa65Suite, MlDsa87Suite
    • prehash suites: MlDsa44PreHashSuite, MlDsa65PreHashSuite, MlDsa87PreHashSuite
  • SLH-DSA TypeScript | WASM
    • pure (FIPS 205): SlhDsa128f, SlhDsa192f, SlhDsa256f
    • pure-mode suites: SlhDsa128fSuite, SlhDsa192fSuite, SlhDsa256fSuite
    • prehash suites: SlhDsa128fPreHashSuite, SlhDsa192fPreHashSuite, SlhDsa256fPreHashSuite
  • Ed25519 TypeScript | WASM
    • Ed25519 (pure + Ed25519ph), Ed25519Suite, Ed25519PreHashSuite
  • ECDSA-P256 TypeScript | WASM
    • EcdsaP256 (hedged + RFC 6979), EcdsaP256Suite
    • DER codec: ecdsaSignatureToDer, ecdsaSignatureFromDer, encodeEcPrivateKey, decodeEcPrivateKey, pointDecompress
  • Hybrid composites PQ-only | Classical+PQ
    • PQ-only: MlDsa44SlhDsa128fSuite, MlDsa65SlhDsa192fSuite, MlDsa87SlhDsa256fSuite
    • Classical+PQ: MlDsa44Ed25519Suite, MlDsa65Ed25519Suite, MlDsa44EcdsaP256Suite, MlDsa65EcdsaP256Suite

Key Agreement

Post-Quantum

  • ML-KEM TypeScript | WASM
    • MlKem512, MlKem768, MlKem1024
  • Ratchet (SPQR)
    • KDFChain, ratchetInit, kemRatchetEncap, kemRatchetDecap, RatchetKeypair, SkippedKeyStore

Hashing

  • Hashing overview
  • SHA-2 TypeScript | WASM
    • SHA256, SHA384, SHA512, SHA224, SHA512_224, SHA512_256
    • HMAC_SHA256, HMAC_SHA384, HMAC_SHA512, HKDF_SHA256, HKDF_SHA512
  • SHA-3 TypeScript | WASM
    • SHA3_224, SHA3_256, SHA3_384, SHA3_512, SHAKE128, SHAKE256
  • BLAKE3 TypeScript | WASM
    • BLAKE3, BLAKE3Stream, BLAKE3KeyedHash, BLAKE3KeyedHashStream
    • BLAKE3DeriveKey, BLAKE3DeriveKeyStream, BLAKE3OutputReader, BLAKE3Hash
  • KMAC
    • CSHAKE128, CSHAKE256, KMAC128, KMAC256, KMACXOF128, KMACXOF256

Transparency Log

  • Merkle
    • MerkleVerifier, MerkleLog
    • SignedLog, Sha256Tree, Blake3Tree, MemoryStorage

Utilities

  • Fortuna CSPRNG
    • Fortuna, SerpentGenerator, ChaCha20Generator, AESGenerator, SHA256Hash, SHA3_256Hash, BLAKE3Hash
  • Utils TypeScript | WASM
    • constantTimeEqual, randomBytes, wipe, encoding helpers
  • TypeScript interfaces
    • Hash, KeyedHash, Blockcipher, Streamcipher, AEAD, Generator, HashFn

Project

Reference

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