Generate and publish key:
gpg --gen-key
gpg --list-keys --keyid-format 0xSHORT
gpg --list-secret-keys --keyid-format 0xSHORT
gpg --keyserver hkp://pool.sks-keyservers.net --send-keys [KEY_ID]
gpg --keyserver http://keyserver.ubuntu.com:11371/ --send-keys [KEY_ID]
Create and encrypt Secure Ring File: