Class 17 Web Application Security
Further reading:
https://www.wired.com/2016/05/hacker-lexicon-sql-injections-everyday-hackers-favorite-attack/
https://arstechnica.com/information-technology/2012/08/passwords-under-assault/
https://arstechnica.com/information-technology/2013/03/how-i-became-a-password-cracker/