A Security engineer is configuring a system that requires the X 509 certificate information to be pasted into a form field in Base64 encoded format to import it into the system. Which of the…

PFX is a binary format that stores a certificate and its private key together, often password-protected, and is not a plain Base64 encoded text format suitable for direct pasting into a text field.

PEM (Privacy-Enhanced Mail) is a standard text-based format for X.509 certificates and other cryptographic data, which uses Base64 encoding to represent the binary certificate data. This format is easily identifiable by its '-----BEGIN CERTIFICATE-----' and '-----END CERTIFICATE-----' headers, making it ideal for copying and pasting into form fields that expect Base64 encoded certificate information.

DER (Distinguished Encoding Rules) is a binary encoding format for X.509 certificates and is not directly Base64 encoded text suitable for pasting into a text field.

CER is a generic file extension that can contain certificates in either DER (binary) or PEM (Base64 text) format; however, it is often associated with binary DER-encoded certificates on Windows systems, which does not meet the Base64 requirement for pasting.