Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

Project Wycheproof tests crypto libraries against known attacks.

A system for distributing and managing secrets

Bouncy Castle Java Distribution (Mirror)

I2P is an anonymizing network, offering a simple layer that identity-sensitive applications can use to securely communicate. All data is wrapped with several layers of encryption, and the network is both distributed and dynamic, with no trusted parties.

A simple Bitcoin trading bot written in Java.

Makes fingerprint encryption a breeze.

Secure storage system based on cryptography｜基于密码学的安全存储系统

ffffffff0x team toolset for penetration testing, cryptography research, CTF and daily use. | ffffffff0x 团队工具集，用来进行渗透测试，密码学研究，CTF和日常使用。

Manuscript is a revolutionary blockchain data streaming framework. With Manuscript, you can seamlessly integrate on-chain and off-chain data into target data storage for unrestricted querying and analysis

A Java standalone implementation of the bcrypt password hash function. Based on the Blowfish cipher it is the default password hash algorithm for OpenBSD and other systems including some Linux distributions. Includes a CLI Tool.

Capillary is a library to simplify the sending of end-to-end encrypted push messages from Java-based application servers to Android clients.

Simple Java connector to Binance Spot API

A shared preference implementation for confidential data in Android. Per default uses AES-GCM, BCrypt and HKDF as cryptographic primitives. Uses the concept of device fingerprinting combined with optional user provided passwords and strong password hashes.

Bus (应用/服务总线) 是一个基础框架、服务套件，它基于Java17+ 编写，参考、借鉴了大量已有框架、组件的设计，可以作为后端服务的开发基础中间件。代码简洁，架构清晰，非常适合学习使用。

A Java API for Alpaca, the commission free, algo friendly, stock trading broker. https://alpaca.markets

Apache Tuweni is a set of libraries and other tools to aid development of blockchain and other decentralized software in Java and other JVM languages. It includes a low-level bytes library, serialization and deserialization codecs (e.g. RLP), various cryptography functions and primatives, and lots of other helpful utilities.

JCrypTool Core Plug-ins

Java implementation of Tink