How to Design USB Dongle

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Dear Receipients I want to know about designing of USB dongle to protect my application software's piracy. If you have good ideas or views regarding the same, pls contact me. Thanks & regards, Jalaj

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I have often seen ads for this in Dr. Dobbs Journal.

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  • Mistoffeles
    Just a little anecdote to give a little perspective: There is a small, independant company called Stardock, they make a number of programs including a game called Galactic Civilization II. In an age when protecting intellectual property has become the norm, when intrusive methods are being used which punish legitimate users while pirates and such are at best inconvenienced in their activities, they have released their game without any copy protection whatsoever. This has freed up development staff and working capital to go towards bug fixing, enhancements and improvements of the delivery system for updates. It has also led to piracy...but no more than every other game is pirated. Pirating is easy, regardless of any antipiracy measures, but due to the delivery method of updates (the only way to get them is to log in with a unique serial number tied to a legitimate purchase, so serial number generators will not work to get updates) and the quality of the game, they have had an overwhelming amount of people who originally pirated the software become paying customers either out of respect for the company or because of the desire to have access to the updates. In fact, many people have been very vocal on the forums about copy protection and how their decision to buy the software hinged on the lack of intrusive, annoying copy protection. Dongles can be lost or damaged and are circumventable, software based schemes are only good until someone figures out how to circumvent thm a well. So the question is, is it worth it to you to put the time and money into adding something to your software that will be more of a hindrance to your legitimate customers than to any pirates? If it is, there are plenty of people who will take advantage of your fears and sell you a copy protection scheme, dongle based or otherwise, that will merely slow down the pirates...and the legitimate sales as well.
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