EasySpreadsheet has the useful feature of being able to save and retrieve encrypted ZIP files. These files require a password to un-encrypt and read the spreadsheet.
To save a spreadsheet with a password:
Go to the File1 menu, and select Save with Password.
A warning will appear to inform you that your file will be compressed, and can only be retrieved if you remember your password. Click OK..proceed with encryption to continue.
A Set Password window will appear for you to type in your secret password. Type your password in the Password box, then confirm your password by typing it again in the box below. Click OK.
This will automatically save your current spreadsheet as a ZIP file. If you save your sheet as another file type, it will NOT be encrypted.
To open an encrypted ZIP file:
Click Retrieve an Old Sheet or press Ctrl+O. (Refer to Retrieving a Sheet.)
An Open window will appear.
To view only ZIP files, select Zip (compressed) from the Files of Type box.
Click the file you want to open, and then click Open.
A window will appear asking you to enter the password. You must know the password in order to open your sheet. Click OK.
EasySpreadsheet will automatically decompress and open your encrypted sheet.
Notes
Industry-standard ZIP encryption is performed. This is reasonably good encryption for normal purposes.
At the time of this writing, there is no 'master' password or back door that we at e-press know about. If you forget your password, you will not be able to retrieve your file (nor will we be able to help you).
There may be methods known to the encryption community for opening such files, even if the password is not known.
This is NOT Microsoft Office encryption. You will not be able to open the encrypted file in Microsoft Office, although you will be able to open up the file any standard ZIP program. Similarly, you will not be able to open a Microsoft Office encrypted spreadsheet with EasySpreadsheet .
If password-protected file is saved, but a non-password protected file of the same name exists in that directory, then the non-password protected file will usually be deleted. It is assumed that you are using password protection so that unauthorized users do not have access to your file.