Configuration

Select Settings->Configure KMail and choose the Crypto-Backends tab on the Security page. Select the entry for Chiasmus and click Configure.... to open the configuration dialog for the Chiasmus backend.

Specify the path to the Chiasmus binary and the directory where key files are to be stored, using the file selection dialogs which open when you click the folder icons next to the path entries.

Close the backend configuration dialog by clicking Ok and check the Chiasmus Checkbox to activate it. Then also close the main configuration dialog.