cruisin
Posts: 31
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| Posted: 11/15/2008, 3:30 PM |
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I saw one post on the PHP side of the forum, but I need a solutions for an asp environment. Basically I want the app to become disabled if it doesn't access and update a client specific key that indicates they are paid through x date. Once they get within 30 days, they would be prompted to retrieve another key. I don't want to try and do this as a web service, since it is likely to be a firewall issue for several clients. Ideally, it would a cut and paste from the main site into the application site inside their network. The issue is to do it in such a way that someone couldn't easily disable the feature.
Suggestions?
Rob
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Vasiliy
Posts: 378
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| Posted: 11/17/2008, 5:34 AM |
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Difficult to implement in ASP - plain text.
I envision as a COM-object, that has some functions used by app.
Functions of this COM-object check for encrypted license file - if exists and valid.
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Vasiliy |
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marcwolf
Posts: 361
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| Posted: 11/17/2008, 3:44 PM |
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I have often though about this issue. And there are a couple of solutions. It also depends on your target audience as in how technically competant they are . If they have an internal web guru who just loves to take apart code then you have little hope of hiding things
However there are a couple of ways one can do it.
1. Webservice - works well however needs to be on the internet.
2. COM component - also works very well except there can be come configuration issues.
3. Heavily compressed Javascript. This can work reasonably well as you can embed a lot of other necessary functions in the JS code as well to make a sizable library (Thus more time consuming to step through) . Then split your registration routines over several function scattered though the code. Your licence key can also be a section of heavily compressed JS code that can be sent seperately and just read in using a standard client include statement..
Alternatively you can store the key in the database and have the ASP extract it into a hidden text box for the JS routines to examine and verify.
As mentioned - nothing is perfect however it comes down to a costing between time and effort to break verses cost-effectiveness just to buy the license.
Hope this gives some help
Dave
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