Devji is one of the exceptional professor. The one you´ll remember till the rest of your life. He changes the paradigm, he makes you jump and do things; he is so upbeat. His genuine care for others is beyond this world. I was mentored by him and learned a lot about the database design and cryptography which helped me a lot in a real-life scenario during my professional career. I´ve been hooked on his stuff for years now and I can´t get enough.