Question

I am trying to create a secure password login screen in c#.Right now i have just created the login screen and I am able to read the username and password from the database.But which i have designed does not have an encrypted password. Can any one help me out how to write a query to generate encrypted password and store the encrypted password value in a separate field.Thanks in advance.

Answer 1

Consider hashing the password that you currently store. SQL can hash a password as follows:

DECLARE @HashThisPassword nvarchar(4000);
SELECT @HashThisPassword = CONVERT(nvarchar(4000),'dslfdkjLK85kldhnv$n000#knf');
SELECT HashBytes('SHA1', @HashThisPassword);

… But SQL shouldn’t even need to do this. You should hash the password as soon as your C# application receives it, and then only ever pass the hashed password into SQL to be saved. When checking if the user has provided the correct password for login, compare the hashes.