OK so it sounds like you need to protect both your data and your code, which
is two very different things. There is no other a spreadsheet product that's
fully secure yet similar in all other respects to Excel, if that's what your
original question was.
Regarding the code maybe simply password protecting the project might be
enough, that will deter most users though not those who hang around here.
It's difficult to make any suggestions about what to do with the data with
the limited information you have given.
Regards,
Peter T
So don't let your users ever get hold of that workbook.