How to encrypt the password in asp.net Web Config

I believe that built-in encryption mechanisms work on the entire connectionString section:

If you would like to encrypt in-memory passwords, maybe entered by the user through a login form, you could use SecureString

Reference : https://msdn.microsoft.com/en-us/library/zhhddkxy(v=vs.100).aspx

That's not entirely true. The Q&A at the bottom mentioned this. To decrypt the web.config you'll need access to the machine it was encrypted on.

this is not the best way to Encrypt to web config because any can run the decrypt the scrpit and decrypt the web config.

Hi refer this blog you can encrypt or decrypt the web.config section, once you encrypted then you dont need to change any thing in the code.

http://www.c-sharpcorner.com/Blogs/15046/encrypt-or-decrpyt-the-web-config-section.aspx

Here is an example on how to encrypt your connection string. It requires a code change however. There is no way to do that without a code change.