> For the complete documentation index, see [llms.txt](https://docs.armchain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.armchain.org/pqc.md).

# Post-Quantum Cryptography

Armchain is quantum-safe by default. Every transaction, every validator signature, and every wallet key uses ML-DSA44, a NIST-standardized algorithm designed to resist attacks from quantum computers.

| Document                                       | Description                                                     |
| ---------------------------------------------- | --------------------------------------------------------------- |
| [Overview](/pqc/overview.md)                   | Why post-quantum cryptography matters and how Armchain uses it  |
| [ML-DSA-44](/pqc/mldsa44.md)                   | Algorithm details, key sizes, and performance characteristics   |
| [Transaction Types](/pqc/transaction-types.md) | How PQC transactions differ from standard Ethereum transactions |