Intro to JWT (JSON Web Token)
JWT tokens are commonly used in authentication and authorization processes to prove a user’s identity or grant access to specific protected resources.
Java EdDSA (Ed25519 / Ed448) Example
EdDSA (Edwards-Curve Digital Signature Algorithm) [RFC 8032] is another additional digital signature scheme added in Java 15 thorough JEP 339. It does not replace the existing Elliptic Curve Digital Signature Algorithm (ECDSA) in JDK. EdDSA provides following parameter choices : Algorithm Name Description EdDSA Edwards-Curve signature algorithm as defined in …
Secure Random Number Generation in Java
If you’ve been developing software for a while, you know how to generate a random number and perhaps even securely with Java’s SecureRandom class. Unfortunately, generating secure random numbers is not as easy as simply using SecureRandom. In this java example, we’ve assembled a simple checklist to help you be …
[Solved] java.security.InvalidKeyException: Parameters missing
You may get InvalidKeyException: Parameters missing error while performing AES encryption or decryption for password or any senstive information.
Java AES Encryption and Decryption: AES-256 Example
Java supports many secure encryption algorithms but some of them are too weak to be used in security-intensive applications. For example, the Data Encryption Standard (DES) encryption algorithm is considered highly insecure; messages encrypted using DES have been decrypted by brute force within a single day by machines such as …
Bypass SSL Certificate Checking in Java
To disable or bypass SSL Certificate checking is never a recommended solution for SSL issues, but at test environment – sometimes you may need this.
Dropwizard Authentication and Authorization
Learn to add username/password based authentication and role based authorization capabilities into REST APIs using basic authentication.
REST API Security Guide
Knowledge of how to secure REST APIs is as much necessary as writing the APIs themselves. Mostly REST APIs are HTTP protocol-based, and any user having an internet connection can access them, and so can bad users as well. It is crucial to write secure APIs to protect the business. …
Java File Checksum – MD5 and SHA-256 Hash Examples
A checksum hash is an encrypted sequence of characters obtained after applying specific algorithms and manipulations on user-provided content. In this Java hashing tutorial, we will learn to generate the checksum hash for the files. 1. Why Generate a File’s Checksum? Any serious file provider provides a mechanism to have …
Java Hashing using MD5, SHA, PBKDF2, Bcrypt and Scrypt
Learn Java Secure Hashing algorithms in-depth. Java examples of MD5, SHA256, SHA512, PBKDF2, BCrypt, SCrypt algorithms with salt to create secure passwords.