Translucent Databases contains several dozen examples written in basic SQL and Java. The code is written to be easy-to-follow and portable. All of the code can be extended and modified to fit a number of different applications. Here are some of the examples:

• A database that hides the position of Navy ships from enemies while simultaneously providing accurate information to those with proper authorization.  
• An anti-rape database that identifies trends without containing any personal information.  
• A babysitter scheduling service that matches parents with available sitters while protecting the sitters' identities and locations'.  
• A department store database that guards the modesty of customers.  
• A private accounting system that detects fraud without revealing information.  
• A poker game for the Internet that prevents cheating.  
• A pharmacy database for preventing dangerous drug interactions while keeping medical records secure.  
• A tool for travel agents to protect their clients from stalkers and kidnappers.  
• A stock exchange transaction mechanism designed to stop insider-trading. 
• A website logfile tool that provides accurate counts of visitors while protecting their identities.
• A credit-card database for defending crucial e-commerce transactions.
• A patent search tool that doesn't reveal the nature and focus of the search.
• A conference bulletin board that routes messages without helping stalkers.
• A tool for studying the radon concentration in homes without maintaining personal information.
• An anti-money laundering database.
  

   
  Anyone who purchases the book receives an unlimited license to use the source code from the examples on up to ten CPUs. If you have greater needs, other licenses are available. Or just buy another copy of the book.