Standalone Installer for Encrypted Spreadsheet for Windows

Completed Posted Oct 30, 2012 Paid on delivery
Completed Paid on delivery

What I have:

A LibreOffice spreadsheet with multiple complex functions.

What I need:

Item #1)

An executable program that will encrypt my spreadsheet and require a user name / password each time prior to referencing and opening my LibreOffice Spreadsheet.

(The program needs to be the only way to open the spreadsheet since it will be encrypted and the program will automatically decrypt it each time the .exe is opened and the user inputs their user name and password).

Item #2)

A custom installer that contains the above program (Item #1) that would automatically install Both LibreOffice and Item #1.

What this project is not:

1) This is Not a project for writing or editing a spreadsheet.

2) This is Not a project for Microsoft Excel.

I wanted to clarify some details for my project need, as some bidders have stated that it is not possible to acieive what I am seeking with this project.

Essentially, I have worked for several years developing a complex and effective spreadsheet with a very unique user interface for my industry. When the spreadsheet is loaded it has the feel of a standalone program, even though it is actually running through LibreOffice calc.

It is my hope to sell this spreadsheet, but want to find a way to secure (encrypt) the document from opening or saving as a new document (spreadsheet) with the password each time that would be different for each licensed user. Hence the need to permenantly encrypt the sheet as a stand alone file (*.exe) that will open in LibreOffice.

I could have designed my spreadsheet to work in Microsoft Excel and use an Excel compiler which would achieve EXACTLY what I need. There are many compilers that can be found online, such as: http://www.exceltoexe.com/ , however this would require my user to already own or need to purchase Office/Excel.

Since LibreOffice is opensource, I decided this is a better option that would not limit my users to preexisting owners of Excel or require them to make an additional purchase.

I have sought compilers for LibreOffice but none are available , hence my need to develop an alternative, the focus of this project.

However, concerning security with a spreadsheet, I have hit the maximum capability of securing the document within the limits of LibreOffice. I seek hopefully a simple solution since I am unable to protect this document properly, even though I do have password protected cells, sheets and hidden tabs, the document is still quite unsecured and susceptible to unwanted modification, or redistribution.

Currently, I have the spreadsheet setup with a password that the user will choose, I save the document with the non-changeable password. This however is somewhat vague, as if they really wanted to save the file to a new file with a different name and no password, it is very easy to do. Even though I have removed the "Save As" function from the file in LibreOffice, it is an easy hack to get it back.

If this project is possible, the actual spreadsheet must be able to save changes to the existing file, just not save as a new file. This is possible with my current setup.

The second issue (Item #2) is that currently I require my user to download and install LibreOffice, then when installed the user opens my spreadsheet file with the custom provided password. It is my hope that I can aleviate some of this confusion by providing the user one nice install package that will automatically install LibreOffice and when completed automatically open my encrypted spreadsheet. Thus giving the user a more fluid install experience and the impression of a complete software package.

There is also another weakness in the current setup, as after the user installs LibreOffice and opens my spreadsheet for the first time, the user is required to properly change the security settings of LibreOffice to allow Macros to run, as the spreadsheet has several macros that give the sheet added functionality. I am not certain if it is possible to automate this process during the install, so that the user can avoid this issue altogether to make a seamless install.
There are many bidders that are clearly not reading or understanding the entirity of this project, when you bid, please copy and paste this sentence into a private message, along with your bid comments, etc. in order to clarify that the details are understood, only those bidders that do this simple instruction will be considered for this project.

Since I have several years of work on this project, the actual file will NOT be provided, thus this project requires to be built around a sample file. When completed, this must be capable of me replacing the sample file with my actual spreadsheet file.

Hopefully this clarifies the details.

C# Programming C++ Programming Software Architecture Visual Basic Windows Desktop

Project ID: #2608017

About the project

15 proposals Remote project Active Nov 7, 2012

Awarded to:

narmas

Hi there! I believe I can accomplish what you want with ease. I promise my work will be functional and user-friendly. I have much experience in computer cryptology and programming (see the "certifications" area of m More

$100 USD in 5 days
(4 Reviews)
3.2

15 freelancers are bidding on average $219 for this job

ineedWorkJob

Greetings sir, i am an expert freelancer. for this job and your 100% satisfaction is assured if you allow me to serve, for more info please cheek your message box for this project(Private)

$200 USD in 5 days
(324 Reviews)
7.5
MuhrizRashid

Hello, I see you require to make your LibreOffice spreadsheet to an executable and encrypted file that can be accessed with user-name and password. I understand you also require an installer for this executable to be i More

$375 USD in 10 days
(65 Reviews)
6.1
managonz

Hello, I can help you with this.

$200 USD in 1 day
(14 Reviews)
5.9
sandeep25101982

Hi, C# expert here. I can do this. Please see PM.. Thanks

$250 USD in 6 days
(29 Reviews)
6.0
vks75

Hi, I am experienced with the same type of work. please look at your PMB.

$222 USD in 3 days
(23 Reviews)
5.4
adim

Hello there, I'm a software engineer with more than 10 years experience in Excel, Access, VBA, VB6 and .NET. I'm sure I can help you with your task. During our contract I will be available via Skype, email and v More

$200 USD in 3 days
(15 Reviews)
4.5
basicos

Check Message

$330 USD in 7 days
(3 Reviews)
3.7
gchoudhury

I can help you with this.

$240 USD in 7 days
(8 Reviews)
3.2
toni888

I HAVE DONE THIS BEFORE! MY EXPERTISE IS FILE ENCRYPTION AND DECRYPTION.

$250 USD in 2 days
(0 Reviews)
0.0
PVI35Et0u

Custom software development: w w w . The Administrator removed this message for containing contact details which breaches our Terms of Service . i o

$250 USD in 1 day
(0 Reviews)
0.0
edwarp

Sir I'm A professional developer, with good expericence with c#, vb.net vb, vba, etc. I'll create the installer...and the login your app need...

$150 USD in 3 days
(0 Reviews)
0.0
RedPeaceCAN

Please check PMB

$225 USD in 15 days
(0 Reviews)
0.0
allerenaf

Hello. I can help you with this project.

$100 USD in 4 days
(0 Reviews)
0.0
jaydipkpatel

Experts in software development and web technologies. Hope have great business together. Please check your PMB.

$200 USD in 3 days
(0 Reviews)
0.0