Site yourself
Security is a very important aspect of any web application. Your site and your users/visitors can be compromized in various ways, by an attacker. Below I will report some of the most common attacks that a site or a web user can suffer.
David J. Malan is a professor of Computer Science at the Harvard School of Engineering and Applied Sciences.
His research interests include cybersecurity, digital forensics, botnets, computer science education, distance learning, collaborative learning, and computer-assisted instruction.Malan teaches Computer Science 50, the largest course in Harvard College, known as CS50x at edX. He also teaches at Harvard Extension School and Harvard Summer School.(source wikipedia)
This amazing dude offers us his summer corses on youtube in a playlist with a total of 20+ hours. If you are amateur and watch the full playlist you will learn many many things about web programming. Click continue reading to watch the first video of his series.
Thank you mr. David!!