A standalone Java 7 implementation of HMAC-based key derivation function (HKDF) defined in RFC 5869 first described by Hugo Krawczyk. HKDF follows the "extract-then-expand" paradigm which is compatible to NIST 800-56C Rev. 1 two step KDF

🔑 A Java utility that form HTTP Authorization request header for API authentication

Simple Android lottery game (Java) that uses cryptography concepts such as: HMAC-SHA256, HMAC-SHA512, AES-128-CBC, AES-128-CTR

An ugly blob container

Spring boot Hmac Authentication for CRUD APIs

PayPal PSP API Integration Project: Project focusing on integrating PayPal as a Payment Service Provider (PSP) into an e-commerce platform, streamlining the checkout and payment process for both customers and merchants. The project aimed to offer a secure and seamless payment experience by leveraging PayPal’s extensive

HMAC SHA256 generation in Java and Python

A library for verifying Zoom webhook events through the x-zm-signature and x-zm-request-timestamp headers.

Information-and-network-security Algorithms for Encryption.

A client-server, multi-threaded. secure instant messenger. Provides confidentiality, integrity, and authentication (CIA)

Computes Message Authentication Codes (MACs) for messages of varying sizes using SHA-128 and SHA-256, and benchmarks time performance.

End to end encrypted application using signal protocol

Voice Over Internet Protocol

'Spend Guide' is full-stack personal expense tracking application. It helps user track their income and spending efficiently. This is the Backend service for this application using Spring Boot which exposes secure REST API with JWT based authentication.

This repo is for AES-Encryption in java.

hmacsha256 implementation using sprinng boot