I develop many forms and templates for clients. I just discovered that I can take a fully locked document from Excel (any version), bring it into open office and unlock it with NO PASSWORD. How is this possible? Is there anything I can do to prevent people from accessing the locked spreadsheets? I have not checked other compatible software, but am very concerned about this, as many of my forms sales depend on the formulas developed by me which can now easily be copied by anyone who knows this.

Thanks for any insight on how to work around this.