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Is protecting Spreadsheet(MS Excel file) with password secure enough?

I can protect excel spreadsheet with two different passwords.
1. read only 
2. write/Edit

Is it secure enough? Can anyone having the spreadsheet read the file contents without passwords?

Pavel_K
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nagendra547
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  • Thanks for reply. There was multiple questions around excel in stackoverflow, but I couldn't get exact reply on security aspects. – nagendra547 Aug 12 '17 at 08:32

1 Answers1

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It is possible to see the contents of the file without knowing the password.

See here, it seems possible to read the contents without the password.

Also this shows how to crack a document. (Thanks @TheFizh)

Oliver Ni
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    Also worth mentioning the password is crackable: https://stackoverflow.com/questions/1026483/is-there-a-way-to-crack-the-password-on-an-excel-vba-project –  Aug 12 '17 at 08:42
  • Thanks for reply. Looks like keeping sensitive information in excel not secure after all. – nagendra547 Aug 13 '17 at 06:34
  • If this helped, please mark it as accepted by pressing the checkmark next to the answer. Thanks! – Oliver Ni Aug 13 '17 at 07:43