- https://en.wikipedia.org/wiki/Public-key_cryptography
- https://en.wikipedia.org/wiki/Key_(cryptography)
- https://en.wikipedia.org/wiki/Certificate_authority
- https://en.wikipedia.org/wiki/Public_key_certificate
- https://en.wikipedia.org/wiki/X.509
- https://en.wikipedia.org/wiki/Transport_Layer_Security
- https://en.wikipedia.org/wiki/OpenSSL