what are the good combination of available encryption algorithms to overcome sensitive data exposure problem in web applications? [closed]

I would like to work on my dissertation and the area of my interest is web application security. I am interested in securing the data to prevent sensitive data exposure vulnerability using a combination of available tools or cryptography algorithms. I mean will it be good to combinely use two cryptography algorithms to prevent sensitive data exposure vulnerability?

Please suggest me tools or algorithms to overcome this problem and which are also implementable.