# 14. Service de cryptographie

The modules described in this chapter implement various algorithms of a cryptographic nature. They are available at the discretion of the installation. Here’s an overview:

- 14.1. `hashlib` — Algorithmes de hachage sécurisés et synthèse de messages
  - 14.1.1. Dérivation de clé
- 14.2. `hmac` — Keyed-Hashing for Message Authentication
- 14.3. `md5` — MD5 message digest algorithm
- 14.4. `sha` — SHA-1 message digest algorithm