Excel Formula Protection
The main task of Excel workbook copy protection is to protect Excel formulas in a way that no one can fetch them.
If the Excel formula protection is not strong enough then anyone who gets permission to open your spreadsheet, (even if it was protected with password, activation key and/or with hardware locking), may copy all of the data and formulas (manually or using some software) into another unprotected workbook and use your intellectual property without any restrictions.
XCell Compiler compiles all formulas from xls into binary code and removes them from the xls cells.
In order to create the strongest Excel formula protection, we have created our own calculation engine to substitute the original Excel calculation engine in the compiled workbook while Excel itself is used for formatting and showing of calculation results. Our calculation engine manipulates binary code algorithms created from original Excel workbook text formulas. The original Excel formulas are removed from the compiled workbook. Restoring the original Excel formulas from the binary code is impossible.
This is the only way for real Excel workbook formula protection.
All other approaches, such as locking Excel formulas or hiding them with standard Excel worksheet password protection, are not secure. If you use them then your Excel formulas may be recovered with software which you may easily find on the Internet.
How to protect Excel formulas
The Excel formula protection is the main feature of the XCell Compiler and is present in all product licenses. To securely protect Excel formulas in your workbook you need just to compile your workbook with XCell Compiler.
If you downloaded and installed our product then just follow these simple steps:
- Open the workbook you want to compile.
- Select ‘DoneEx’ in the Excel main menu and select the ‘Compile’ item
- Select compilation options and press ‘Compile’ button on the compilation form.