Implementation of SHA-256 Cryptography algorithm in VB.NET

Introduction

Here in this article I am explaining that how to implement a login form with the help of SHA-256 Cryptography algorithm. SHA-256 is a standard method for generating digital signature. It is a one way algorithm. The SHA256 algorithm is known as one way encryption, hash or checksum, digest and digital signature algorithm. The SHA core provide implementation of cryptographic Hashes SHA-1, SHA-2, SHA-256, SHA-512.


Getting Started

• Simply create a new windows application. 
• Drag two TextBox, two Label and one Button control on your form. Your form will look like below.
  
  
   
• Then add the below code.
  
      Private Sub userLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
          userLogin.Click
          If txtUsername.Text.ToUpper <> "SHALINI" Then
              MessageBox.Show(" showing Error: Username doesn't exists.")
              Exit Sub
          End If
          Dim shaM As New SHA256Managed()
          If shaM.ComputeHash(txtvalidpassword.Text) <> "JUNEJA" Then
              MessageBox.Show("Error: Password doesn't match.")
              Exit Sub
          Else
              MessageBox.Show("Welcome users you are now logged in to the data page.Now you can see all
          information about data!")
          End If
      End Sub
   
• Now run your application.
  
  

Output:-