Knowledge Factory

RSA is asymmetric encryption, in which a key needed to encrypt data is made public, but the corresponding key needed to decrypt it is kept private, for example in a file on the server to which clients connect. In principle, such a system solves the problem of how to send a temporary encryption key securely to the server when opening a secure connection*. A very common asymmetric encryption system is RSA, named after inventors Rivest, Shamir & Adleman. Following technologies stack being used: Spring Boot 2.1.1.RELEASE Spring 5.1.3.RELEASE  Maven 3 JDK 1.8 Eclipse Oxygen jQuery Bootstrap Free Maker javascript RSA  This Online RSA application has three modules - It's is shown below Module 1:Generate RSA Key Online Action Click to Generate RSA Key Button, System will generate RSA key pair Module 2: Encryption Module 3:Decryption Download Source Code

Click here to view online demo Following technologies stack being used: Javascript bootstrap HTML  web page Download Source Code  $ git clone https://github.com/knowledgefactory4u/Javascript

The download link is provided at the bottom of the page. Before downloading the source code please go through the functionalities available, technologies used, and a brief description.   For more topics, click the below link:   Kotlin hashing - MD5, SHA-1, SHA-256, SHA-384, SHA-512, and PBKDF2   Hashing in Java - MD5 ,SHA-1, SHA-256, SHA-384,SHA-512 and PBKDF2 Kotlin: RSA + AES a double layer security system  Kotlin- AES, RSA, 3DES Encryption and Decryption with example     Kotlin - RSA Encryption and Decryption with example Java-RSA Encryption and Decryption with example JAVA- AES Encryption and Decryption with example    Java - DES Encryption and Decryption with example   Java- Blowfish Encryption and decryption with Example   RSA + AES a double layer security system - Architecture + Implementation example - JAVA Kotlin- Blowfish Encryption and decryption with Example        Following technologies stack being used: Spring Boot 2.1.1.RELEASE Spring 5.1.3.RELEASE  Maven 3 JDK

This guide walks you through the process of creating an application that produces RESTful web services and consumes a RESTful web service. To demonstrates the functionality we need a web service first. Name it ‘REST Producer’, because it provides data for the ‘REST Consumer’ REST Producer Controller Class @ RestController public class Controller { @ Autowired UserService service; @ GetMapping (value = "/getUser" ) public ResponseEntity < Map < Integer , User >> listAllUsers() { return new ResponseEntity <>(service.getUser(), HttpStatus.OK); } @ PostMapping (value = "/deleteUser" ) public ResponseEntity < Map < Integer , User >> deleteUser(@ RequestBody Key key) { return new ResponseEntity <>(service.deleteuser(key.getKey()), HttpStatus.OK); } Key-POJO Class public class Key { private Integer key; public Integer getKey() { return key; } public void se

For a Spring Boot Application, you can generate an application jar that contains Embedded Tomcat or Undertow or jetty. You can run a web application as a normal Java application! The advantage of this is you don't need the server pre-installed in the deployment environment. Below we are showing a simple Spring Boot application example using Undertow as Embedded Server. Undertow is a flexible performant web server, providing both blocking and non-blocking APIs based on NIO. It has a composition based architecture that allows you to build a web server by combining small single purpose handlers. The gives you the flexibility to choose between a full Java EE servlet container, or a low-level non-blocking handler, to anything in between. The main advantages of undertow are HTTP/2 Support, HTTP Upgrade Support, Web Socket Support, Servlet 4.0, Embeddable, Flexible. 1. Maven/Dependency Management Remove the existing tomcat dependency on spring-boot-starter-web and add undertow depende

For a Spring Boot Application, you can generate an application jar that contains Embedded Tomcat or Undertow or jetty . You can run a web application as a normal Java application! The advantage of this is you don't need the server pre-installed in the deployment environment.   Below we are showing a simple Spring Boot application example using Jetty as Embedded Server. 1. Maven/Dependency Management [pom.xml] Remove the existing tomcat dependency on spring-boot-starter-web and added jetty dependency <?xml version = "1.0" encoding = "UTF-8" ?> <project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0  https://maven.apache.org/xsd/maven-4.0.0.xsd" > <modelVersion> 4.0.0 </modelVersion> <parent> <groupId> org.springframework.boot </

In this article, we will go through how to implement the circuit breaker design pattern using Hystrix and Spring Boot What is Hystrix? Hystrix is the fault tolerance library. Using this library we can implement a circuit breaker design pattern. Hystrix is watching methods for failing calls to related services. If there is such a failure, it will open the circuit and forward the call to a fallback method. The library will tolerate failures up to a threshold. Beyond that, it leaves the circuit open. Which means, it will forward all subsequent calls to the fallback method, to prevent future failures. This creates a time buffer for the related service to recover from its failing state. For a quick start following technologies stack being used: Spring Boot 2.1.1.RELEASE Spring 5.1.3.RELEASE Hystrix  Maven 3 JDK 1.8 Eclipse Oxygen Project Structure To demonstrate the circuit breaker design pattern we need a web service first. Name it ‘REST Producer’, because it provides data