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.

Multi-platform transparent client-side encryption of your files in the cloud

Project Wycheproof tests crypto libraries against known attacks.

A p2p, secure file storage, social network and application protocol

Spongy Castle - a repackage of Bouncy Castle for Android (which ships a crippled version of BC)

EJBCA® – Open-source public key infrastructure (PKI) and certificate authority (CA) software.

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。

A Java implementation of Shamir's Secret Sharing algorithm over GF(256).

Hardware-based attestation / intrusion detection app for Android devices. It provides both local verification with another Android device via QR codes and optional scheduled server-based verification with support for alert emails. It uses hardware-backed keys and attestation support as the foundation and chains trust to the app for software checks.

(Android) Networking and Cryptography Library (NaCL) JNI binding. JNI is utilized for fastest access to native code. Accessible either in Android or Java application. Uses SWIG to generate Java JNI bindings. SWIG definitions are extensible to other languages.

JRuby's OpenSSL gem

Java binding to the Networking and Cryptography (NaCl) library with the awesomeness of libsodium

Repositório que contém os componentes para facilitar a implementação de assinatura digital nos padrões da ICP-BRASIL

Java web and command line applications demonstrating various security topics

Java library for distributed zero knowledge proof systems

A FRamework for Efficient Secure COmputation

Whitebox AES implementation in Java. Chow scheme.

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.

This modest Java Application aims to teach children the basics of (classical) cryptography, try out different encryption types and practice their skills.

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