Restrict users from modifying the contents of the spreadsheet (makes it read only).Prevent unauthorized access to the workbook.Protecting an Excel workbook with a password can work in two ways: Since MS Office 2016, 256-bit AES protection has been integrated, upgrading from the old 128-bit encryption, which makes modern Excel comparable to dedicated password managers. The aforementioned security layer makes your Excel workbooks resist unauthorized tampering.
With 750 million people worldwide and 89 percent of businesses taking daily advantage of MS Excel, many forget to utilize its formidable security feature: adding passwords and making it read-only. Although cloud-based solutions and budget apps are trying to steal Excel’s thunder, it still remains the king of accounting, charting and data organization.