I have been working on a trading system using excel for a number of
years now. Recently I had a big break from a currency trader with a
large bank who wants to use the program and I want to privdee him with
a stand alone version that he can use to trade. The idea is to build a
track record with realmoney and then it could be sold potentially. The
problem I now have is to produce a program for him to use preferably
using excel but maybe in VB if better but it needs to be totally
secure in terms of the code as obviously I do not want to give years
of work away (if it is succesful then it could be worth a lot).

My question is fairly simple: is it possible for me to use some means
(i have heard blowfish encryption software could do it but it all
seems prohibitively complex to use) I can use to protect my code yet
make the program available to third parties (banks for example). I am
also interested in a means of having way of having the program
disable itself unless an email or web update unlocks it again.

Any pointers/advice would be much appreciated. Kind regards, Mark

If you require absolute security, then I'm afraid Excel is not the
platform for you. It is possible to protect your work from the
average user by hiding columns/sheets, using worksheet and workbook
passwords, and password protecting your VBA code. However, a
determined hacker can break all of these passwords using tools that
are available on the net. A truly compiled program (like VB) would be
much more secure.

DS




(Mark) wrote in message . com...
I have been working on a trading system using excel for a number of
years now. Recently I had a big break from a currency trader with a
large bank who wants to use the program and I want to privdee him with
a stand alone version that he can use to trade. The idea is to build a
track record with realmoney and then it could be sold potentially. The
problem I now have is to produce a program for him to use preferably
using excel but maybe in VB if better but it needs to be totally
secure in terms of the code as obviously I do not want to give years
of work away (if it is succesful then it could be worth a lot).

My question is fairly simple: is it possible for me to use some means
(i have heard blowfish encryption software could do it but it all
seems prohibitively complex to use) I can use to protect my code yet
make the program available to third parties (banks for example). I am
also interested in a means of having way of having the program
disable itself unless an email or web update unlocks it again.

Any pointers/advice would be much appreciated. Kind regards, Mark

Thanks for that i suspectedas much, appreciate the feedback.

Kind regards, mark



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