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#1
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Is there a way (encryption type) to really protect my worksheet???
Hi.
i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#2
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Is there a way (encryption type) to really protect my worksheet???
Hi,
There is no secure way of doing either of those things relying on Excel security, anyone with sufficient determination and Google will quickly remove all your passwords despite 'workbook open' and 'code module' passwords being more secure than workbook/worksheet. Mike "SpeeD" wrote: Hi. i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#3
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Is there a way (encryption type) to really protect my workshee
Hi mike.
Do you advise any software or have any solution for this? Thanks SpeeD "Mike H" wrote: Hi, There is no secure way of doing either of those things relying on Excel security, anyone with sufficient determination and Google will quickly remove all your passwords despite 'workbook open' and 'code module' passwords being more secure than workbook/worksheet. Mike "SpeeD" wrote: Hi. i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#4
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Is there a way (encryption type) to really protect my workshee
Hi,
Perhaps this from Chip Pearson http://www.cpearson.com/excel/CreateAddIn.aspx Mike "SpeeD" wrote: Hi mike. Do you advise any software or have any solution for this? Thanks SpeeD "Mike H" wrote: Hi, There is no secure way of doing either of those things relying on Excel security, anyone with sufficient determination and Google will quickly remove all your passwords despite 'workbook open' and 'code module' passwords being more secure than workbook/worksheet. Mike "SpeeD" wrote: Hi. i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#5
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Is there a way (encryption type) to really protect my workshee
Indeed, Excel's security, all all security for all Office components, is
pretty feeble. Access is ok, but still crackable if you know what you're doing. I've heard that .NET has very good security. I can't vouch for it though. I'm just now starting to learn it myself. As for your original question about Excel, quite simply no; it can't be protected with any degree of confidence. Regards, Ryan--- -- RyGuy "Mike H" wrote: Hi, Perhaps this from Chip Pearson http://www.cpearson.com/excel/CreateAddIn.aspx Mike "SpeeD" wrote: Hi mike. Do you advise any software or have any solution for this? Thanks SpeeD "Mike H" wrote: Hi, There is no secure way of doing either of those things relying on Excel security, anyone with sufficient determination and Google will quickly remove all your passwords despite 'workbook open' and 'code module' passwords being more secure than workbook/worksheet. Mike "SpeeD" wrote: Hi. i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#6
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Is there a way (encryption type) to really protect my workshee
Thank you all for your advice...
Perhaps with some other way besides strong and viseble security i can protect my work... Is there a way to hide procedures or any kind of code inside vba? some thought about that?? Any one with other ideas is welcome to say something!! :-) SpeeD "ryguy7272" wrote: Indeed, Excel's security, all all security for all Office components, is pretty feeble. Access is ok, but still crackable if you know what you're doing. I've heard that .NET has very good security. I can't vouch for it though. I'm just now starting to learn it myself. As for your original question about Excel, quite simply no; it can't be protected with any degree of confidence. Regards, Ryan--- -- RyGuy "Mike H" wrote: Hi, Perhaps this from Chip Pearson http://www.cpearson.com/excel/CreateAddIn.aspx Mike "SpeeD" wrote: Hi mike. Do you advise any software or have any solution for this? Thanks SpeeD "Mike H" wrote: Hi, There is no secure way of doing either of those things relying on Excel security, anyone with sufficient determination and Google will quickly remove all your passwords despite 'workbook open' and 'code module' passwords being more secure than workbook/worksheet. Mike "SpeeD" wrote: Hi. i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#7
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Is there a way (encryption type) to really protect my workshee
Again, you can do everything that you proposed to do, but all your effort
will be quickly undone by anyone who is very proficient in Excel. You can keep the casual user at bay, but with enough will and determination, anyone can crack into you Excel file. Nothing is secure in Excel-world!! Bottom line!! Regards, Ryan--- -- RyGuy "SpeeD" wrote: Thank you all for your advice... Perhaps with some other way besides strong and viseble security i can protect my work... Is there a way to hide procedures or any kind of code inside vba? some thought about that?? Any one with other ideas is welcome to say something!! :-) SpeeD "ryguy7272" wrote: Indeed, Excel's security, all all security for all Office components, is pretty feeble. Access is ok, but still crackable if you know what you're doing. I've heard that .NET has very good security. I can't vouch for it though. I'm just now starting to learn it myself. As for your original question about Excel, quite simply no; it can't be protected with any degree of confidence. Regards, Ryan--- -- RyGuy "Mike H" wrote: Hi, Perhaps this from Chip Pearson http://www.cpearson.com/excel/CreateAddIn.aspx Mike "SpeeD" wrote: Hi mike. Do you advise any software or have any solution for this? Thanks SpeeD "Mike H" wrote: Hi, There is no secure way of doing either of those things relying on Excel security, anyone with sufficient determination and Google will quickly remove all your passwords despite 'workbook open' and 'code module' passwords being more secure than workbook/worksheet. Mike "SpeeD" wrote: Hi. i Do some programming and external work with excel and i want to prevent 2 things: 1- someone from opening the worksheet without password. 2- someone not paying what the own for the job. and for this i have to protect the code too! is there a way to enforce this? there are some programs that claim to break any and every password in excel.. thanks SpeeD |
#8
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Is there a way (encryption type) to really protect my workshee
On Fri, 13 Mar 2009 11:36:52 -0700, ryguy7272
wrote: Again, you can do everything that you proposed to do, but all your effort will be quickly undone by anyone who is very proficient in Excel. You can keep the casual user at bay, but with enough will and determination, anyone can crack into you Excel file. Nothing is secure in Excel-world!! Bottom line!! Regards, Ryan--- Stopping someone from using it - no. Stopping someone from clamming it is their code - maybe. If your program is compiled into an exe file, you can examine the hexadecimal code using debug.exe. So far as I know every Microsoft operating system has the file buried somewhere within the system. You can use that program to examine the hex code of the compiled program. There may be places where the code is 'just taking up space'. If so you can replace some of that code with your name and date. It will never show when the program is run so there is a chance that a thief will not look for it. It's been so long sine I used debug I don't remember if you have to use hexadecimal to input your name or if you can simply use letters. Somewhere there is a program named Abacus. It will tell you what every hex statements does, in raw computer language. -- Chuck |
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