His interests lie in security systems related to the internet and smartphones. he specializes in cyber-security and studies of operating systems including Apple and Android. His expertise lies in identifying problems in the design of applications and developing tools to detect them. Professor Du develops improved access control for mobile systems and also is able to comment on general mobile devices including Apple.

He has spoken at various conferences like Samsung Research America and  in Beijing. Additionally he has been a part of many es and has written an array of publications.