| Extensie | Naam |
|---|---|
| .PEM | PEM - Base64-encoded certificate / key container (X.509, PKCS) |
| .P7M | PKCS#7 / S/MIME Message (digitally signed or encrypted) |
| .CER | Security certificate (X.509 .cer) |
| .REQ | Certificate Signing Request (CSR) - .req |
| .CRT | Security certificate (X.509 .crt) |
| .CSR | Certificate Signing Request (PKCS#10) |
