Skip to main content

How to use SQL Server Encryption with Symmetric Keys?

Before create a symmetric key, you first setup your database’s master key and certificate and this master key and certificate help us to protect of your symmetric key store using the ALGORITHM AES_256.


In the below examples, I am using a default master key password is System!123 and the certificate name is Certificate_demo.

The following steps as given below,
--======================================
--MASTER KEY ENCRYPTION WITH PASSWORD
--=======================================
CREATE MASTER KEY 
    ENCRYPTION BY 
      PASSWORD = 'System!123' 
GO 


--===============================
--OPEN MASTER KEY
--==============================
OPEN MASTER KEY 
    DECRYPTION BY 
        PASSWORD = 'System!123'
GO


--=============================
--CREATE CERTIFICATE
--==================================
CREATE CERTIFICATE Certificate_demo 
  WITH SUBJECT = 'Certificate_demo' 
GO 


--====================================================================
--CREATE SYMMETRIC KEY WITH AES_256 SECURE ALGO USING ENCRYPTION CERTIFICATE
--===========================================
CREATE SYMMETRIC KEY SymmetricKey_demo WITH 
IDENTITY_VALUE = 'SymmetricKey_demo', 
    ALGORITHM = AES_256, 
        KEY_SOURCE = 'A very secure and strong password' 
    ENCRYPTION BY CERTIFICATE Certificate_demo; 
GO 

--=========================================================
--CREATE PROCEDURE FOR OPEN SYMMETRIC KEY WITH CERTIFICATE
--=======================================
CREATE PROCEDURE [dbo].[sp_OpenKeys] 
AS 
BEGIN 
BEGIN TRY 
    OPEN SYMMETRIC KEY SymmetricKey_demo    
    DECRYPTION BY CERTIFICATE Certificate_demo 
END TRY 
BEGIN CATCH 
    -- HANDLE NON EXISTANT KEY HERE 
END CATCH 
END 
GO

--=============================
--CREATE ENCRIPTION FUNCTION
--===============================
CREATE FUNCTION [dbo].[FNC_ENCRIPTION_TOKEN](@Token NVARCHAR(255)) 
RETURNS VARBINARY(8000) 
AS 
BEGIN 
    DECLARE @encriptToken VARBINARY(8000); 
    SET @encriptToken = EncryptByKey(Key_GUID('SymmetricKey_demo'), @Token) 
    RETURN (@encriptToken) 
END 

GO


--============================
--CREATE DECRIPTION FUNCTION
--============================
CREATE FUNCTION [dbo].[FNC_DECRIPTION_TOKEN](@encrypToken VARBINARY(8000)) 
RETURNS NVARCHAR(255) 
AS 
BEGIN 
    DECLARE @decriptToken VARBINARY(4000) 
    SET @decriptToken = DecryptByKey(@encrypToken) 
    RETURN (@decriptToken) 
END 
GO 


--===========================================
-- USE OF ENCRIPTION AND DECRIPTION FUNCTION
--===============================
DECLARE @GUID NVARCHAR(55);
DECLARE @EncryptedToken NVARCHAR(max);

SET @GUID = 'ADC10CFC-EC8A-424B-AF5E-1F1B177D304B'

-- OPEN SECURITY KEYS USING PROC [dbo].[sp_OpenKeys] FOR ENCRIPTION AND DECRIPTION
EXEC [dbo].[sp_OpenKeys]

-- THE FUNCTION [dbo].[FNC_ENCRIPTION_TOKEN] IS USE FOR GUID ENCRIPTION.
SET @EncryptedToken = [dbo].[FNC_ENCRIPTION_TOKEN](@GUID);

-- THE FUNCTION [dbo].[FNC_DECRIPTION_TOKEN], USE FOR DECRIPT TO A ENCRIPTED GUID.
SET @GUID = [dbo].[FNC_DECRIPTION_TOKEN](@EncryptedToken);

SELECT @EncryptedToken, @GUID

GO


--==============================================
--IF NEEDED, DROP MASTER KEY, CERTIFICATE AND SYMMETRIC KEYS
--==========================================================
DROP SYMMETRIC KEY SymmetricKey_demo
GO 

DROP CERTIFICATE Certificate_demo
GO 

DROP MASTER KEY
GO
By Anil Singh | Rating of this article (*****)

Popular posts from this blog

List of Countries, Nationalities and their Code In Excel File

Download JSON file for this List - Click on JSON file    Countries List, Nationalities and Code Excel ID Country Country Code Nationality Person 1 UNITED KINGDOM GB British a Briton 2 ARGENTINA AR Argentinian an Argentinian 3 AUSTRALIA AU Australian an Australian 4 BAHAMAS BS Bahamian a Bahamian 5 BELGIUM BE Belgian a Belgian 6 BRAZIL BR Brazilian a Brazilian 7 CANADA CA Canadian a Canadian 8 CHINA CN Chinese a Chinese 9 COLOMBIA CO Colombian a Colombian 10 CUBA CU Cuban a Cuban 11 DOMINICAN REPUBLIC DO Dominican a Dominican 12 ECUADOR EC Ecuadorean an Ecuadorean 13 EL SALVADOR

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin

React | Encryption and Decryption Data/Text using CryptoJs

To encrypt and decrypt data, simply use encrypt () and decrypt () function from an instance of crypto-js. Node.js (Install) Requirements: 1.       Node.js 2.       npm (Node.js package manager) 3.       npm install crypto-js npm   install   crypto - js Usage - Step 1 - Import var   CryptoJS  =  require ( "crypto-js" ); Step 2 - Encrypt    // Encrypt    var   ciphertext  =  CryptoJS . AES . encrypt ( JSON . stringify ( data ),  'my-secret-key@123' ). toString (); Step 3 -Decrypt    // Decrypt    var   bytes  =  CryptoJS . AES . decrypt ( ciphertext ,  'my-secret-key@123' );    var   decryptedData  =  JSON . parse ( bytes . toString ( CryptoJS . enc . Utf8 )); As an Example,   import   React   from   'react' ; import   './App.css' ; //Including all libraries, for access to extra methods. var   CryptoJS  =  require ( "crypto-js" ); function   App () {    var   data

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü   Tables and data grids ü   Notifications ü   Loader ü   Calendar ü   Display time, date and age ü   Progress Bar ü   Tooltip ü   Overlay ü   Icons ü   Menu ü   Charts ü   Map ü   Pdf viewer ü   And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan You was inspired by Angular and the Vue.js 2 components looks like -

Encryption and Decryption Data/Password in Angular

You can use crypto.js to encrypt data. We have used 'crypto-js'.   Follow the below steps, Steps 1 –  Install CryptoJS using below NPM commands in your project directory npm install crypto-js --save npm install @types/crypto-js –save After installing both above commands it looks like  – NPM Command  1 ->   npm install crypto-js --save NPM Command  2 ->   npm install @types/crypto-js --save Steps 2  - Add the script path in “ angular.json ” file. "scripts" : [                "../node_modules/crypto-js/crypto-js.js"               ] Steps 3 –  Create a service class “ EncrDecrService ” for  encrypts and decrypts get/set methods . Import “ CryptoJS ” in the service for using  encrypt and decrypt get/set methods . import  {  Injectable  }  from   '@angular/core' ; import   *   as   CryptoJS   from   'crypto-js' ; @ Injectable ({    providedIn:   'root' }) export   class   EncrDecrS