In a previous blog post we explored how to sign messages using the Estonian eID card. In this video, we demonstrate how a receiver who got a signed email message would be able to verify that the email really did come from the advertised sender.
I have uploaded the revised code to github, please feel free to have a browse – but the plugin is linux only, and not ready for production (mainly due to lack of error handling, not cleaning up the tmp folder after operations, and hardcoding the eID PIN)
David Vassallo's Blog 