XLS Padlock is a useful tool that was created to help you secure your most important worksheets and workbooks.
The software does this by turning the Excel documents into protected applications which are encrypted either with hardware-locked activation keys (will only run on a single machine, based on its ID) or with dongle protection (external USB device required to unlock the encrypted files).
· Microsoft Excel 2000 - 2013
· Applications built with the Trial edition will show a nag screen and expire after one week after their last build
· You cannot distribute your protected worksheets
· nag screen