cryptkeeper software package provides EncFS system tray applet for GNOME, you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cryptkeeper
cryptkeeper is installed in your system.
Make ensure the cryptkeeper package were installed using the commands given below,
$ sudo dpkg-query -l | grep cryptkeeper *
You will get with cryptkeeper package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty |
| Section | Administration Utilities |
| Package | cryptkeeper |
| Version | 0.9.5-5.1ubuntu4 |
| Description | EncFS system tray applet for GNOME |
| Sub Section | Admin |