Common Use: To share public key
Server cert, cert chain, keys, CRL
Extensions: .pem .cer .crt .key
Used on Windows Systems
Can contain: certs, cert chains, CRL, NEVER private key
Common Extensions: .der
Common Extensions: .cer
Common Extensions: .p12 / .pfx
Purpose: ASCII certs
Purpose: Almost any cert purpose
Format: Binary (CER)
Can contain: certs, cert chains, private keys
Format: ASCII
Purpose: Binary certs
Common Purpose: Used to store private keys with certificate
Format: DER
Format: CER or DER
Common Extensions: .p7b / .p7c
Format: Binary