"How safe is MySQL?" is a question that comes up quite regularly in many IT environments, and indeed from day-to-day use of the Internet. We will explore the MySQL "scandal" here and explore some ways to improve your overall web security posture...
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The real question, of course, is how safe is MySQL, really? In general terms, MySQL is used more by larger organizations, like governments, than by individuals. And so the larger databases, with more data and potentially more critical data, tend to require more system resources, requiring more software and hardware to support. Of course, MySQL's low-cost, high-available nature makes it an ideal choice for government organizations and other large-scale organizations. This gives them the ability to lock down data or deny any external access.
However, what about the individual home user? If you're the sort of person who's not in a position to run and maintain a server - and especially if you don't have thousands upon thousands of dollars to throw at IT repairs - then how do you secure your data? Well, first of all, don't panic. MySQL isn't going to crash; it's not going to stop updating automatically as your system changes; and it certainly won't crash when there are power surges (which can happen).
How Safe Is MySQL?
What you need to do is make sure you secure your data. There are a few options here. You can buy an offline (offline storage facility) copy of your data, or you can use a data backup service like Carbonite or External Secure File. External secure file is best if you use one website database like Facebook or Twitter, since these websites store a lot of data on a single server.
For something like a "personal blog" (a small, self-hosted web server that acts just like a personal website but that hosts database and source code), this isn't really something you should worry about. If you have a WordPress site, you'll find there are plenty of plugins out there that will allow you to secure your data with a simple twist of a switch. Basically, you'd do this by installing a "htaccess" file into your WordPress system settings. If you want to learn more about using Html5 in WordPress, go check out this great tutorial by WordPress guru David A Crooks.
For larger databases like Facebook and MySpace, the best thing to do is to secure the server using a system like Mcafee's Personal Internet Shield. This software will run as part of your firewall and intercept all incoming traffic before it gets to your web pages, where it can be read by unscrupulous people. You should also look into firewall support for your email programs. This will also protect your email data from being infected.
In terms of PHP vs. MySQL, you can play it safe with an old-school PHP. Just remember that while it's relatively secure, it still runs the risk of scripts or other dangerous applications attacking your system. For example, spyware can infect many web servers via infections like Spybot. If you're on a slow connection or using a free hosting plan, chances are your PHP application is already open to all the various threats.
On the other hand, MySQL offers much better benefits in terms of security and data protection. If you need to know how safe is MySQL?, look at your current hosting plan. If it's all free, good - if not, then start looking for a better option. You can always upgrade later, of course.
As for database security, MySQL comes with its own features to combat any potential attacks. For one, the use of "db_id" table and "userid" values makes identifying clients more secure. Certain privileges such as "root" can also be granted to specific users, as long as they meet the requirements. Also, data is mapped more logically, so multiple queries for the same data are done in a separate transaction.
And what about the corruption of your data? MySQL's data structures make it much harder for people to corrupt your data. What happens when someone executes a series of complicated SQL statements in a row? Most likely, the server won't crash, because all the statements would go into the same data file, which MySQL uses to locate all the rows and their data within an hour.
But what if someone does manage to corrupt your database? It's pretty easy - the affected files will be inaccessible, and your entire database will have to be restored. You can then opt to recover the data from a backup copy. However, you might still ask: How safe is MySQL? MySQL is not without its problems, but as technology improves, these will diminish. MySQL 5.5 is currently the latest version and brings some major improvements over the past versions - this should reduce the risk of data loss drastically.
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