{"id":386,"date":"2014-08-26T11:53:34","date_gmt":"2014-08-26T03:53:34","guid":{"rendered":"http:\/\/suherman.asia\/w2\/?p=386"},"modified":"2014-08-26T11:53:34","modified_gmt":"2014-08-26T03:53:34","slug":"cell-column-level-encryption","status":"publish","type":"post","link":"https:\/\/suherman.asia\/w2\/cell-column-level-encryption.html","title":{"rendered":"Cell and Column-Level Encryption"},"content":{"rendered":"<p>kadangkala kita menyimpan sebuah data kedalam sebuah tabel di database yang sifat datanya sangat rahasia misalnya menyimpan data username dan password dari pengguna sebuah aplikasi.<!--more--><\/p>\n<p>dalam artikel ini saya mencoba berbagi cara mengenai melakukan enkripsi dengan menggunakan asymmetric key.<\/p>\n<p>pertama kita siapkan sebuah tabel T_Pengguna yang berisi field Fusername dan Fpassword<\/p>\n<pre class=\"lang:tsql decode:true \">USE [AdventureWorks] \r\nGO \r\n  \r\nCREATE TABLE [dbo].[T_Pengguna]( \r\n[FUsername] [nvarchar](50) NOT NULL, \r\n[FPassword] [varbinary](max) NOT NULL, \r\nCONSTRAINT [PK_T_Pengguna] PRIMARY KEY CLUSTERED \r\n( \r\n[FUsername] ASC \r\n) \r\n) ON [PRIMARY] \r\n  \r\nGO<\/pre>\n<p>kemudian langkah selanjutnya kita buat terlebih dahulu asymmetric key nya terlebih dahulu.<\/p>\n<pre class=\"lang:tsql decode:true \">create asymmetric key AsymKeyAdvWorks \r\nauthorization dbo with algorithm = RSA_2048 \r\nencryption by password= N'P@ssw0rdYgB4ik'<\/pre>\n<p>nah sampai sini kita bisa mulai ber operasi untuk melakukan enkripsi terhadap sebuah cell atau field. kita akan coba input 2 buah user :<\/p>\n<pre class=\"lang:tsql decode:true \">Declare @Usrnme1 Varchar(50) = 'Pengguna_1' \r\nDeclare @UsrnmePsw1 Varchar(50) = 'PaswwordK3reN' \r\nDeclare @Usrnme2 Varchar(50) = 'Pengguna_2' \r\nDeclare @UsrnmePsw2 Varchar(50) = 'B4nJar8arU' \r\n  \r\ninsert into T_Pengguna values(@Usrnme1, \r\nENCRYPTBYASYMKEY(ASYMKEY_ID('AsymKeyAdvWorks'),@UsrnmePsw1)) \r\n  \r\ninsert into T_Pengguna values(@Usrnme2, \r\nENCRYPTBYASYMKEY(ASYMKEY_ID('AsymKeyAdvWorks'),@UsrnmePsw2)) \r\n  \r\ngo<\/pre>\n<p>nah sampai sini kita telah berhasil melakukan enkripsi untuk Password-password tadi yang dimasukkan kedalam tabel T_Pengguna.<\/p>\n<p><a href=\"http:\/\/suherman.asia\/w2\/wp-content\/uploads\/2014\/08\/10.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-387\" src=\"http:\/\/suherman.asia\/w2\/wp-content\/uploads\/2014\/08\/10.png\" alt=\"10\" width=\"445\" height=\"118\" srcset=\"https:\/\/suherman.asia\/w2\/wp-content\/uploads\/2014\/08\/10.png 445w, https:\/\/suherman.asia\/w2\/wp-content\/uploads\/2014\/08\/10-300x79.png 300w\" sizes=\"auto, (max-width: 445px) 100vw, 445px\" \/><\/a><\/p>\n<p>Mungkin untuk kasus ini sebenarnya tidak perlu dilakukan proses dekripsi. Namun apabila suatu waktu diperlukan perlakuan deskripsi field FPassword dapat dilakukan dengan T-SQL berikut :<\/p>\n<pre class=\"lang:tsql decode:true \">select Fusername,CONVERT(varchar(max), \r\nDecryptByAsymKey(ASYMKEY_ID('AsymKeyAdvWorks'), \r\nFPassword,N'P@ssw0rdYgB4ik')) as pw from T_Pengguna<\/pre>\n<p>Ok, selamat mencoba !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>kadangkala kita menyimpan sebuah data kedalam sebuah tabel di database yang sifat datanya sangat rahasia misalnya menyimpan data username dan password dari pengguna sebuah aplikasi.<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/suherman.asia\/w2\/cell-column-level-encryption.html\">Continue reading<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":387,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[62,22],"class_list":["post-386","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sql-server","tag-hardening","tag-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cell and Column-Level Encryption - Suherman Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/suherman.asia\/w2\/cell-column-level-encryption.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cell and Column-Level Encryption - Suherman Blog\" \/>\n<meta property=\"og:description\" content=\"kadangkala kita menyimpan sebuah data kedalam sebuah tabel di database yang sifat datanya sangat rahasia misalnya menyimpan data username dan password dari pengguna sebuah aplikasi. 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