> For the complete documentation index, see [llms.txt](https://zeropass.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zeropass.gitbook.io/whitepaper/specification.md).

# Specification

## Cryptography

| Type                           | Algorithm                                                                           |
| ------------------------------ | ----------------------------------------------------------------------------------- |
| Digital Signature              | ECDSA\*                                                                             |
| Symmetric Encryption           | AES256-GCM                                                                          |
| Asymmetric Encryption          | ECIES\*                                                                             |
| Hash function                  | SHA256 / SHA512                                                                     |
| Message authentication code    | HMAC                                                                                |
| Public Key derivation function | Based on  [BIP32](https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki)\* |
| Secret Sharing                 | Shamir's Secret Sharing                                                             |

\* The algorithm uses [secp256k1](http://www.secg.org/sec2-v2.pdf#page=13) domain parameters to define Elliptic Curve

## Implemntation

**GithHub**: N/A (yet) \
\
&#x20;ZeroPass implementations will use Crypto++® Library <http://cryptopp.com/>\
&#x20;to incorporate cryptographic algorithms. Crypto++ is currently the most validated implementations of cryptographic schemes (for c++).

©ZeroPass 2017