JScript.Encode


JScript.Encode

JScript.Encode is a method created by Microsoft used to encode both server and client-side JavaScript or VB Script source code in order to protect the source code from copying [ [http://www.microsoft.com/mind/0899/scriptengine/scriptengine.asp Script Encoding with the Microsoft Script Engine Version 5.0] ] . JavaScript code is used for creating dynamic web content on many websites, with the source code easily viewable, so this was meant to protect the code.

The encoding is a simple polyalphabetic substitution using three alphabets.

How To Use

You can use a command line script encoder [http://www.microsoft.com/mind/0899/scriptengine/scriptengine.asp] to encode your scripts. To encode a HTML web-page file called default.htm, use the following command:

screnc.exe default.htm defaultenc.htm

It would output to a file called defaultenc.htm.

Weaknesses

It has been reverse engineered [ [http://www.virtualconspiracy.com/content/articles/breaking-screnc Breaking the Windows Script Decoder] ] and many websites provide an on-the-fly decoder [ [http://www.virtualconspiracy.com/index.php?page=scrdec/intro Windows Script Decoder] ] .

References

External links

* [http://www.microsoft.com/downloads/details.aspx?familyid=E7877F67-C447-4873-B1B0-21F0626A6329&displaylang=en Download encoder]
* [http://www.virtualconspiracy.com/index.php?page=scrdec/intro Windows Script Decoder]


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