Open manually; may run a program or script when opened
★ ★ ★ ★ ☆ Common
Base64-encoded certificate file, such as a PEM-encoded X509 certificate; used to authenticate a secure website; typically imported from a Unix-based Apache Web server and compatible with OpenSSL applications.
PEM certificate files are generated automatically and are not meant to be opened or edited manually. Some secure websites may ask users to upload a PEM file (possibly sent in an e-mail) in order to authenticate their identity.