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Encrypt Decrypt data using AES in Java

AES stands for Advanced Encryption Standard. AES is an Symmetric Key Algorithm, that means key used for encrypting the data, same key will be used for decryption of the encrypted data. This algorithm supplants DES algorithm. This post shows how to use AES algorithm in Java to encrypt and decrypt data. Encrypting Data- import java.security.GeneralSecurityException; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; public class AESTest1 { public static void main(String[] args) throws GeneralSecurityException { KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); keyGenerator.init(128); SecretKey key = keyGenerator.generateKey(); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, key); byte encryptedData[] = cipher.doFinal(args[0].getBytes()); } } In above example we have used KeyGenerator class, which generates key for encrypting data, as we are using...

Java Tools Plugin for Notepad++ Update

This post and the plugin is outdated. Please use plugin from this link which is updated and allows customization of shortcut key mappings and much more . This post is regarding the update for Notepad++ plugin which I wrote to use compile and execute Java programs from the Notepad++ editor itself. I have updated the plugin so that user can customize the shortcut keys assigned for compiling and executing the programs. Following image shows simple Settings dialog where you can customize the shortcut keys mapping. Although user can customize the keys but to apply them Notepad++ must be restarted. Well, I tried but in Notepad++, there is no way to change mapping after initialization process of plugin.. Click here to download the plugin.

Spring AOP : JDK Proxy vs CGLib Proxy

Spring framework is one of the most widely used framework in Enterprise application development. It has so many features such as Dependency injection, Data access integration, MVC, AOP which takes care of most of the boilerplate part of project, and developers can then focus on business logic only. One of the important feature in Spring is AOP. It is used by almost every enterprise application which is being developed using Spring. AOP So what is AOP? Definition of AOP - Aspect oriented programming is a programming paradigm which aims to increase modularity by allowing the separation of cross cutting concerns. Well, my understanding of AOP is - AOP allows us to introduce/join new modules in your project at pre-specified dynamic locations without having to code for it. Traditional examples of AOP is Transaction management, logging etc. You can read more about AOP at here . This article is for those who know AOP, have used AOP in their projects but do not know how Spring or o...

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