Security

OTP4U is a tool that allows users to easily exchange a random key between them and then use it as a key for a One Time Pad cipher (if the key comes from a true random number generator, the One Time Pad is an unbreakable cipher). Since version 0.9.3 a CSPRNG (Cryptographically Secure Pseudo Random Number Generator) is used to generate the keys of the cipher.

LockCrypt is an easy to use database to guard your personal details. It offers a central location to manage your website passwords, accounts, contacts, credit cards and other sensitive data. LockCrypt includes a password generator to create passwords, and can export to CSV, XML or plain text files. It can also import from XML. Accounts can be sorted in to groups and assigned an icon to make them easier to find. Drag and drop is supported, as well as MySQL and flat file database support. LockCrypt uses AES encryption to protect the details you enter. This is regarded by the cryptography industry to be virtually unbreakable. There's also a mobile version of LockCrypt which runs on any J2ME capable device, allowing you to take your accounts database with you on the move. LockCrypt's Secure Clipboard protects any details you copy to the clipboard through the program, and Native translations into Czech, German and others are also available.

This is a simple example of how to use java to encrypt strings. Best used for learning purposes, source code and class files available for download.

A similar to Tripwire, file system integrity checking tool but develop in java and cross platform. This tools checking and source control using check sum algorithm like MD5, SHA and CRC. It provide generate current file integiry checksum record to compare.

Java Proxy lets you access computers behind a firewall. It includes Socks and Web proxy as a user program interface. Also includes functions for secure connections between two computers, as well as simple Web server with HTTPS support.