1. Overview Unlock the power of Keycloak for seamless authentication and authorization in your applications. This comprehensive guide is designed for software developers who want to integrate Keycloak into their systems to enable secure user login and token exchange with Google. By following step-by-step instructions and best practices, you’ll learn how to…

Unlock the power of secure communication with Java! Learn how to implement X509 certificate validation simply and straightforwardly, step-by-step. Overview An X.509 certificate is a digital certificate used to verify a particular entity’s identity, such as a website or an individual. X.509 certificates are widely used in various applications, including secure…

Overview XML Signature is a standard in the digital signature that allows the authentication and validation of data being sent as XML objects in web service communication. Java 6 introduces Java XML Digital Signature API, which allows the generation and validation of signatures in an XML message. According to RFC 2828…

1. Introduction When working with a REST API, we often deal with a single entity to create, update, delete, list, and get. But there are also times when we need to manage entities in batches, and this mostly happens in the back office. For example, in an ecommerce platform, promotions are governed…

Learn how to code Hello World in Java using IntelliJ and Maven. 1. Introduction This blog will teach you how to create a Hello World application using a Maven archetype in Java using IntelliJ IDE. 2. Requirements You must have the following installed on your local machine. OpenJDK 11 Maven IntelliJ community edition 3. Creating a new Java project from a Maven archetype 3.1 Creating the project Open…

Are you looking to implement authentication forms in your NextJS project using Amazon Cognito? Then this article is for you. 1. Introduction 1.1 Amazon Cognito Amazon Cognito is an authentication and authorization service that lets you manage your applications’ access control, whether a web or mobile app. Whether dealing with a small number of users…

Jasypt and JCE are encryption protocols we can use in our Spring config to secure passwords. For example, if you wanted to encrypt the API token of your GitHub repository. Or encrypting the Spring config server’s security.user.password value. Jasypt Example Instruction on how we can use Jasypt in our Spring Boot application…

1. Introduction NextJS is an open-source framework for developing React applications, while Cognito is a user identity service that lets you secure your applications. Cognito also supports the OAuth form of authentication. AWS Amplify is an open-source library for managing AWS services like Cognito. It exposes an Authenticator library that can secure…

1. Overview Microservice is a service-oriented architecture where an application is deployed as a collection of loosely-couple services. The goal is to make each service independent, fine-grained, scalable and flexible, allowing faster testing and release. 2. Microservices 2.1 Business Services 2.1.1 applicant-services Dummy service that returns a list of applicant names. @GetMapping("/applicants-by-job") public List<String> getApplicantsByJob() {…