How do I encrypt files with Keka?

Download Keka here.

Use the following settings in the screenshots below.

General Tab

Default General settings.
Keka 1

Compression Tab

You can change the Save to Location if you want to choose another spot. Check Move to trash original file(s) after compression for security.
Keka 2

Extraction Tab

Check Move to trash original file(s) after been extracted for security.
Keka 3

Keka Menu

Fill in “Password” and “Repeat” fields with the password.  Always use “7z” to compress the file. Check Delete files(s) after compression.
Keka 4
Drag and drop files onto the Keka Menu to compress files.
Empty Trash.