Libsodium documentation
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Introduction
Installation
Quickstart and FAQ
Projects using libsodium
Commercial support
Bindings for other languages
Usage
Helpers
Padding
Secure memory
Generating random data
Secret-key cryptography
Public-key cryptography
Hashing
Password hashing
Key derivation
Key exchange
Advanced
Internals
Roadmap
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Commercial support
The following companies offer professional support services for libsodium and applications using libsodium:
Libsodium-specific services include:
  • Cryptographic and implementation auditing of libsodium usage.
  • Security review of constructions, protocols, and applications using libsodium.
  • Consulting on libsodium usage in applications -- web apps, backends, mobile, embedded, kernel, etc.
  • General consulting and review of cryptography inquiries.
  • Implementation security and helping to work toward a vulnerability-free codebase.
  • Reverse engineering of complicated binaries.
  • General consulting, advising, mentoring, and development.

Paragon Initiative Enterprises (https://paragonie.com)

Libsodium-specific services include:
  • Library integration, with a focus on web applications (PHP, .NET, Python).
  • Bespoke or standard high-level protocol design and implementation (e.g. Noise).
  • Security audits for in-house library integrations and/or high-level protocols.
  • Custom application development that requires cryptography.
  • Consulting and mentoring services.
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(Please submit a pull request if you want your company added to that list)
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Edge Security (https://www.edgesecurity.com)
Paragon Initiative Enterprises (https://paragonie.com)