Abstract: The past decade has seen the exponential rise of online social media usage. Applications have moved from being client-server to collaborative in nature. The next decade will be witness to a tremendous integration of cyber space with physical systems. While these interaction paradigms open up tremendous possibilities they also open up certain risks. This talk will look at the evolving interaction paradigms and their security challenges. Short Bio: Dr. Sundeep Oberoi is the Global Head for Niche Technology Delivery Group in TCS. The role of the group is to provide delivery in specialized technology like IT Security, RFID sensors and NFC, Web 2.0 technologies, User experience, Collaboration and Unified Communication, Cloud Computing and Next Generation Networks. He also heads the TCS Certifying Authority, which is India's largest issuer of legally valid Digital Certificates. Dr Sundeep Oberoi has authored a book "E-Security and You" explaining the IT Act, 2000 and several other books, conference and journal publications. He holds a PhD in Computer Science from IIT Bombay, an MTech in Computer Science from IIT Delhi and a BTech in Chemical Engineering from IIT Kanpur.