.pem
=> Privacy Enhancement Mail Certificate.key
extension => is a PEM file containing just the private-key.pkcs
|.pfx
|.p12
=> is a fully encrypted passworded container format that contains both pubkic and private certificate pairs.cert
|.cer
|.crt
=> is a public .pem formatted file with diffrent extenssions for windows
*.private.pem
=*.key.pem
=*.key
*.public.pem
=*.crt.pem
=*.crt
=*.cer.pem
=*.cer
- passworded(
*.key
+*.cer
) =*.pkcs
|*.pfx
|*.p12
*.key.pem
+*.crt.pem
in one file =>*.keycer.pem