rage
A simple, secure and modern file encryption tool (and Rust library) with small explicit keys, no config options, and UNIX-style composability.
TLDR
Encrypt a file for user and save it to message.age
$ echo "[Your secret message]" | rage --encrypt --recipient [user] --output [path/to/message.age]
Decrypt a file with identity_file and save it to message
$ rage --decrypt --identity [path/to/identity_file] --output [message]