Always Encrypted<\/strong> is a feature in SQL Server designed to protect sensitive data, such as Social Security numbers or credit card information. In this guide, we’ll focus on testing Always Encrypted using parameterized queries to ensure data remains secure during common operations like searching, inserting, and updating.<\/p>\n When working with encrypted columns, it’s important to understand the two types of encryption:<\/p>\n For testing purposes, especially when performing searches in the To insert or update data in an encrypted column, the SQL client must be “Always Encrypted aware,” meaning it can handle encryption and decryption operations.<\/p>\n When using applications like .NET, the client-side framework must support Always Encrypted to allow updates and inserts. Ensure your application uses parameterized queries to pass encrypted values so that encryption happens transparently.<\/p>\n Both SQL Server Management Studio (SSMS) and applications must have the Always Encrypted option enabled.<\/p>\n This creates a self-signed certificate and stores it in your personal certificate store.<\/p>\n Create a table with columns encrypted using deterministic and randomized encryption.<\/p>\n – To insert data, use parameterized queries so that the client handles encryption transparently.<\/p>\n Note:<\/strong> Ensure that Enable Parameterization for Always Encrypted<\/strong> is checked in your query options.<\/p>\n To read encrypted data, ensure your connection includes – Without encryption enabled:<\/strong> Encrypted columns display as binary data. Ensure that Enable Parameterization for Always Encrypted<\/strong> is checked in your query options.<\/p>\n Testing Always Encrypted with parameterized queries ensures that encryption and decryption processes happen transparently, without requiring developers to manage cryptographic details. This enhances security and reduces the risk of data leaks, even if unauthorized access to the database occurs.<\/p>\n By following these steps, you can securely implement and test Always Encrypted in SQL Server, protecting your sensitive data while maintaining application functionality and performance.<\/p>\n References:<\/strong><\/p>\n It’s more important than ever to be vigilant in protecting and securing our data. Always Encrypted is a feature in SQL Server designed to protect sensitive data, such as Social Security numbers or credit card information. In this guide, we’ll focus on testing Always Encrypted using parameterized queries to ensure data remains secure during common operations like searching, inserting, and updating. <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[120,12,53,91,29,84],"tags":[341,299,339,343,196,342,338,86,131,340],"class_list":["post-840","post","type-post","status-publish","format-standard","hentry","category-encryption","category-internals","category-powershell","category-query-optimization","category-security","category-sql-developer","tag-net-framework","tag-always-encrypted","tag-data-encryption","tag-data-protection","tag-database-security","tag-encryption-keys","tag-parameterized-queries","tag-powershell","tag-sql-server","tag-ssms"],"yoast_head":"\nUnderstanding Encryption Types<\/h2>\n
\n
WHERE<\/code> clause, use deterministic encryption.<\/p>\nUpdating and Inserting Encrypted Data<\/h2>\n
Enabling Parameterized Queries<\/h2>\n
\n
Microsoft.Data.SqlClient<\/code>, which fully supports Always Encrypted.<\/li>\n<\/ul>\nConfiguring the Client<\/h2>\n
\n
Column Encryption Setting=Enabled;<\/code> to your connection string.<\/li>\nEnabling Always Encrypted in SSMS<\/h3>\n
\n
Setting Up Always Encrypted<\/h2>\n
1. Configure a Column Master Key<\/h3>\n
\n
CMK1<\/code>.<\/li>\n2. Configure a Column Encryption Key<\/h3>\n
\n
CEK1<\/code>.<\/li>\nCMK1<\/code> as the column master key.<\/li>\nCreating a Table with Encrypted Columns<\/h2>\n
CREATE TABLE [dbo].[Clients](\n [PatientId] [int] IDENTITY(1,1) NOT NULL,\n COLLATE Latin1_General_BIN2 \n ENCRYPTED WITH (\n COLUMN_ENCRYPTION_KEY = [CEK1], \n ENCRYPTION_TYPE = Deterministic, \n ALGORITHM = 'AEAD_AES_256_CBC_HMAC_SHA_256'\n ) NOT NULL,\n NOT NULL,\n NOT NULL,\n NULL,\n NULL,\n NULL,\n [ZipCode] [int] NULL,\n NULL,\n \n ENCRYPTED WITH (\n COLUMN_ENCRYPTION_KEY = [CEK1], \n ENCRYPTION_TYPE = Randomized, \n ALGORITHM = 'AEAD_AES_256_CBC_HMAC_SHA_256'\n ) NOT NULL,\n PRIMARY KEY CLUSTERED ([PatientId] ASC)\n) ON [PRIMARY];<\/code><\/pre>\nSSN<\/code> uses deterministic encryption to allow for searches.
\n– BirthDate<\/code> uses randomized encryption for higher security.<\/p>\nInserting Records Using Parameterized Queries<\/h2>\n
Using T-SQL in SSMS<\/h3>\n
DECLARE @SSN nvarchar(11) = '795-73-9838';\nDECLARE @BirthDate datetime2(7) = '1980-01-01';\n\nINSERT INTO [dbo].[Clients] (\n [SSN],\n [FirstName],\n [LastName],\n [MiddleName],\n [StreetAddress],\n [City],\n [ZipCode],\n [State],\n [BirthDate]\n)\nVALUES (\n @SSN,\n 'John',\n 'Doe',\n 'M',\n '123 Main St',\n 'New York',\n 10001,\n 'NY',\n @BirthDate\n);<\/code><\/pre>\nUsing PowerShell<\/h3>\n
$connectionString = \"Data Source=YourServer;Initial Catalog=AlwaysEncryptedDb;Integrated Security=True;Column Encryption Setting=Enabled;\"\n\n$query = @\"\nINSERT INTO dbo.Clients (\n [SSN],\n [FirstName],\n [LastName],\n [MiddleName],\n [StreetAddress],\n [City],\n [ZipCode],\n [State],\n [BirthDate]\n) VALUES (\n @SSN,\n @FirstName,\n @LastName,\n @MiddleName,\n @StreetAddress,\n @City,\n @ZipCode,\n @State,\n @BirthDate\n);\n\"@\n\n$connection = New-Object System.Data.SqlClient.SqlConnection($connectionString)\n$command = $connection.CreateCommand()\n$command.CommandText = $query\n\n$command.Parameters.Add(\"@SSN\", [System.Data.SqlDbType]::NVarChar, 11).Value = \"123-45-6789\"\n$command.Parameters.Add(\"@FirstName\", [System.Data.SqlDbType]::NVarChar, 50).Value = \"Yvonne\"\n# Add other parameters as needed\n\n$connection.Open()\n$command.ExecuteNonQuery()\n$connection.Close()<\/code><\/pre>\nReading Encrypted Data<\/h2>\n
Column Encryption Setting=Enabled<\/code>.<\/p>\nSELECT * FROM [dbo].[Clients];<\/code><\/pre>\n
\n– With encryption enabled:<\/strong> Encrypted columns display decrypted values.<\/p>\nUpdating Encrypted Data Using Parameterized Queries<\/h2>\n
Using PowerShell<\/h3>\n
$connectionString = \"Data Source=YourServer;Initial Catalog=AlwaysEncryptedDb;Integrated Security=True;Column Encryption Setting=Enabled;\"\n\n$patientId = 1\n$newSSN = \"123-45-1234\"\n$query = \"UPDATE dbo.Clients SET SSN = @newSSN WHERE PatientId = @patientId\"\n\n$connection = New-Object System.Data.SqlClient.SqlConnection($connectionString)\n$command = $connection.CreateCommand()\n$command.CommandText = $query\n\n$command.Parameters.Add(\"@newSSN\", [System.Data.SqlDbType]::NVarChar, 11).Value = $newSSN\n$command.Parameters.Add(\"@patientId\", [System.Data.SqlDbType]::Int).Value = $patientId\n\n$connection.Open()\n$command.ExecuteNonQuery()\n$connection.Close()<\/code><\/pre>\nUsing C#<\/h3>\n
using System.Data.SqlClient;\n\nstring connectionString = \"Data Source=YourServer;Initial Catalog=AlwaysEncryptedDb;Integrated Security=True;Column Encryption Setting=Enabled;\";\n\nint patientId = 1;\nstring newSSN = \"123-45-1234\";\n\nusing (SqlConnection conn = new SqlConnection(connectionString))\n{\n conn.Open();\n string sql = \"UPDATE dbo.Clients SET SSN = @newSSN WHERE PatientId = @patientId\";\n using (SqlCommand cmd = new SqlCommand(sql, conn))\n {\n cmd.Parameters.AddWithValue(\"@newSSN\", newSSN);\n cmd.Parameters.AddWithValue(\"@patientId\", patientId);\n cmd.ExecuteNonQuery();\n }\n}<\/code><\/pre>\nUsing T-SQL in SSMS<\/h3>\n
DECLARE @SSN nvarchar(11) = '795-73-9838';\nUPDATE [dbo].[Clients] SET [SSN] = @SSN\nWHERE [PatientId] = 1;<\/code><\/pre>\nConclusion<\/h2>\n
\n