Difference between Docker engine and docker deamon?

Hi!

 Somewhat confused between docker engine and deamon ...can anyone help me..

Well I’m new to docker also and have had similar confusion. I have started a brief (almost none of this is my work, its stuff I have borrowed from the net/docker website/webinars etc) as need to explain this to colleagues. Link below hope it helps. I certainly welcome from the community suggestions for changes. But my main focus is how one can use Docker to increase application security with minimal or zero changes to the application source code.

https://drive.google.com/open?id=0B2j2ohNiXEl-bWxPczlhdEQ5U0E