CrystalAEP operates by running within every instance of a protected program (for example the web browser), performing checks at key points within the program’s life-time in an attempt to ensure that it is not under attack. CrystalAEP also alters the behaviour of protected programs to render them more difficult targets for malicious software seeking to be installed on a user’s system – if the vulnerable program malware is targeting is in an unknown and constantly changing state many traditional methods for exploiting flaws within the software are made significantly more difficult.
A second way in which malicious software is installed is through “drive-by download” style attacks. In attacks of this kind an unsuspecting user visits a website which triggers a security flaw within a piece of software the user has installed. Many flaws in completely legitimate software packages (for example the web browser, or word processing package) can permit a malicious website to force the installation of malicious software. These issues are altogether more sinister as even computer savvy users who would not download and run an obviously untrustworthy email attachment or file can be attacked through this method. Often when a computer user is surfing the Internet and then just discovers malware has been installed, a drive-by download is how it occurred. Again CrystalAEP helps us to protect.
We cannot consider CrystalAEP an replacement for antivirus program or other security software but can protect the system from exploits that target vulnerabilities that have not been fixed yet.
List of level and their use for CrystalAEP.
- Minimum CrystalAEP – Provides only the basic protection, none of which should be invasive or disrupt delicate programs. This mode provides a backstop against some classes of threat and is surprisingly effective considering the limited features that it enables, but is not recommended for most programs as little is done to disrupt exploit attempts.
- Moderate CrystalAEP – A good improvement on Minimum, this mode aims to provide a compromise between reliability and security, erring on the side of reliability. This mode is recommended for applications which do not cope well with the High mode of protection, but is otherwise not recommended.
- High CrystalAEP – Provides an equal balance between reliability and security. Most of the particularly effective anti-exploit techniques are enabled when using this mode. This is the recommended mode for most users.
- Maximum CrystalAEP – This mode provides the highest level of protection which Crystal affords, enabling nearly all of the protection features the product can offer. Occasionally Maximum protection provides too locked-down an environment for flexible programs to operate under, and is therefore not recommended above High for most users. Maximum can be enabled for systems for which security is absolutely paramount above software reliability.
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