AWS Encryption SDK
Architect's Kung Fu tutorial collection Article collection
AS2 1.1 server implementation in Java
Password Safe encrypted databases, Java library
Provides encryption & password hashing for your app or Hibernate POJOs
A command line interface for encryption and decryption using the NTRU
Encryption/Decryption demonstration app using the S-DES algorithm
FinalCrypt - Unbreakable One-Time Pad Encryption
A library for easy use of symmetric encryption and decryption in java
A free and easy-to-use password protected file archiver
a free cross platform checksum utility, supports 58+ hash algorithms
Java Encryption Utility.
Java SSH API
UDP based desktop chatting app which supports AES-256 bit encryption.
SLS Team Java Library
Generates Latin squares and counts their transversals
Format-Preserving Encryption Library for Java
Open source version of Google Authenticator (except the Android app)
Open Source Security tool to audit hashed passwords.
Create,extract and encrypt ZIP,GZIP,TAR,BZIP2,TAZ files on Java mobile
File Shredder Project