We read about security breaches every day in the news. And our client's need for security is growing as the hackers develop more and better tools. One answer is to two-factor authentication, something most computer users know of, even if the name sounds somewhat daunting: Most secure sites, such as banks, credit card companies, and major websites, already use it. Every time you have to answer security questions, or enter the contents of a test message, you have used it. Taylor Sharpe from Dallas has developed a method that works with FileMaker. There is an example file at the link.
Source: Two-Factor Authentication