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#1
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Security Question
I have written a very detailed carbon footprint calculator for a large
packaging company and we're just about to go through third party accreditation. We now want to enable other users to make use of it. How can we do this and protect it from being copied, sent, emailed etc |
#2
Posted to microsoft.public.excel.misc
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Security Question
Lock the copies of the spreadsheet file away in a secure cupboard (and lock
the backups away in another secure cupboard). If you want to be very careful, encrypt the files. The protections within Excel itself aren't sufficiently secure to stop someone determined from cracking them. If you look at the archives of this group you will see how often people forget passwords for their files, and how easily they (or anyone else who has access to the files) can find how to crack them. If you don't want someone to have access, don't let them near the files. -- David Biddulph "JBW" wrote in message ... I have written a very detailed carbon footprint calculator for a large packaging company and we're just about to go through third party accreditation. We now want to enable other users to make use of it. How can we do this and protect it from being copied, sent, emailed etc |
#3
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Security Question
I will second the comments made by David Biddulph - if you publish it in
Excel, I can get into it and if the incentive ($$ or just plain curiosity) is there, I'll reverse engineer it from that point even if you've obfuscated worksheet functions and code processes. I went through this same discussion with a gentleman on these very boards maybe 2 years ago. He has an excellent, useful and almost unique product that he worked very hard on. When it came time to think about distribution and sales, we were simply stopped by all efforts to protect it, including possible methods such as using an Excel "compiler" to protect the package (they were not sophisticated enough, or took away from the ability to expand rows/columns for additional data within the package). His solution: he went to a professional coding team and had the entire project redone in another language so that the compiled product could be released, but without the source code going along with it. An NO scheme is 100% protection against unauthorized copying/distribution - just look at all of the money that Microsoft has tossed at that effort over the years, not to mention the efforts and jackboot tactics that organizations like the RIAA have taken to prevent such things --- and then look at the results: there are still illegal copies of applications, music, movies and anything else still making the thieves big bucks. "JBW" wrote: I have written a very detailed carbon footprint calculator for a large packaging company and we're just about to go through third party accreditation. We now want to enable other users to make use of it. How can we do this and protect it from being copied, sent, emailed etc |
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