Zend - The PHP Company


Zend Guard 6.0

Zend Guard - Encode Your PHP Applications

Zend Guard, the most widely accepted PHP encoding and obfuscation product on the market, protects your application from unlicensed use and reverse engineering.


As software vendors write more and more commercial applications in PHP it is critical that their intellectual property is protected. With applications now providing evaluation copies and electronic downloads it can get even more complicated to ensure that they are being distributed securely, whether free, for evaluation or for commercial sale.

Zend Guard protects your applications from reverse engineering and unauthorized customization by providing encoding and obfuscation.  It further protects from unlicensed use and redistribution by providing comprehensive licensing support.  This combined functionality makes software distribution worry free.

Prevent reverse engineering through PHP encoding and obfuscation

You worked hard to develop your code.  Now you need to protect it.  Zend Guard's powerful encoding and obfuscation technologies prevent reverse engineering, copyright infringement and unauthorized modification of your code.

Encoding is a process where the PHP source code is converted to an intermediate machine readable format.  This format is hard for humans to read and convert back to source code.  As a result it protects your code from casual browsing.  This means that if people obtain access to your site's code they will not be able to use that for unintended purposes.

Obfuscation is a process where the code is intentionally made very hard to read as source code or as reverse engineered code.  This obfuscation is designed to manage risks that stem from unauthorized access to source code. These risks include loss of intellectual property, ease of probing for application vulnerabilities and loss of revenue that can result when applications are reverse engineered, modified to circumvent licensing and then recompiled. Although reverse engineering always existed in computer software, it is especially important for in computing environments such as PHP which take advantage of dynamic processing of language elements rather than code which has been compiled into machine language before being deployed.

Protect your PHP code from unauthorized use

Zend Guard's licensing capabilities allow Independent Software Vendors (ISVs) to create a variety of licensing policies for their commercial PHP applications.  The product supports most commonly used licensing models such as concurrent users, time limited, segment of network, or server specific licensing.  These capabilities allow vendors to maximize their revenue by preventing unauthorized use.

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