Is open source software secure?
We say yes! Many like us will argue that open source software is more well-tested, and thus, more secure than closed-source software. If you'd like to learn more, please see: Open source software: The question of security!
Guarding Against Open Source Peepers
Just like WordPress, s2Member is open-source software. Which is wonderful. However, this also makes it possible for anyone to grab a copy of the software, and try to learn their way around its security measures. In order to keep your installation of s2Member unique/secure, you should configure a Security Encryption Key. s2Member will use your Security Encryption Key to protect itself against hackers. It does this by encrypting all sensitive information with your key. A Security Encryption Key is unique to your installation.