http://www.ietf.org/rfc/rfc4880.txt

加密文件	gpg -e -r <uid> <filename>
解密文件	gpg <filename>
生成密钥	gpg --gen-key
列出公钥	gpg --list-keys / -k
列出私钥	gpg --list-secret-key / -K
导出公钥	gpg --export <uid> -a > <filename.asc>
导入公钥	gpg --import <filename.asc>
删除公钥	gpg --delete-keys <uid>
删除私钥	gpg --delete-secret-keys <uid>
信任公钥	gpg --sign-key <uid>

https://keybase.io/

Related: Study_Security_EncryptionAlgorithm

参考资料

[1]. http://www.openpgp.org/
[2]. https://gpgtools.org/
[3]. http://www.pgpi.org/
[4]. http://www.gnupg.org/
[5]. http://openpgpjs.org/
[6]. http://www.cryptography.org/getpgp.htm