:og:title: krypteia — post-quantum & classical cryptography in Rust
:og:description: Pure-Rust post-quantum (ML-KEM, ML-DSA, SLH-DSA) and classical (RSA, ECC, EdDSA, AES) cryptography — side-channel hardened, zero-dependency, embedded-first. Pre-1.0, unaudited; structured for lab-class evaluation.

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krypteia — Cryptography Workspace
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:Status:  Draft
:Version: |release|
:Scope:   Full workspace — both ``quantica`` (post-quantum) and
          ``arcana`` (classical) crates, plus the shared ``silentops``
          toolkit and the side-channel analysis annex.

The krypteia workspace is a pure-Rust cryptographic toolkit with
zero external dependencies, designed from the start for embedded
targets (Cortex-M, RISC-V) and hardened against physical
side-channel attacks. Five library crates are published on
crates.io under the ``krypteia-*`` namespace, alongside the C-ABI
(``*_ffi``) and WebAssembly (``*_wasm``) bindings:

* :doc:`quantica <_gen/quantica_overview>` — post-quantum algorithms
  standardised as FIPS 203 / 204 / 205 (ML-KEM, ML-DSA, SLH-DSA);
* :doc:`arcana <_gen/arcana_overview>` — classical algorithms (RSA,
  ECDSA/ECDH, EdDSA, AES, ChaCha20-Poly1305, hashes, MACs);
* :doc:`tessera <_gen/tessera_overview>` — shared hash primitives:
  SHA-2 / SHA-3, the SHAKE / cSHAKE XOFs, BLAKE2 / BLAKE3, HMAC,
  SP 800-185 and the KDF family (HKDF, PBKDF2, SP 800-108, scrypt,
  Argon2);
* :doc:`silentops <_gen/silentops_overview>` — side-channel toolkit:
  constant-time primitives, dudect-style timing leakage verifier,
  ctgrind Valgrind harness;
* :doc:`memory <_gen/memory_overview>` — TLSF allocator for bare-metal
  targets (`os-alloc` / `self-alloc` / `global-alloc`).

.. toctree::
   :maxdepth: 3
   :caption: Documentation

   _gen/root_overview
   _gen/quantica_overview
   _gen/arcana_overview
   _gen/tessera_overview
   _gen/silentops_overview
   _gen/memory_overview
   api

.. toctree::
   :maxdepth: 2
   :caption: Governance

   _gen/contributing
   _gen/security
   _gen/changelog

.. The side-channel annex ``sca/index`` is pulled in as a nested
   toctree from inside ``_gen/quantica_overview.md`` (the staging
   step in ``gendoc.sh`` appends the directive); it should not be
   listed here as a sibling chapter.