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