Re: Licensing a database app

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Brian,

Have a look at LSAPI to get more ideas...

>We are developing a database application that tracks vehicles. We need a
>method to limit the number of vehicles the application will track.
>
>The application is licensed on a per vehicle basis. If a customer wants to
>track 1000 vehicles, then the customer must buy a 1000 vehicles license and
>the application must then enforce that limit.
>
>The application uses an ODBC data source (SQL Server or Oracle) and VB COM
>components to access the data. The database is installed on the customer's
>server. *** Therefore the customer has full control over the database
>content and database structure. *** Any solution must take into account
 the
>customer can change any field of any table and modify the structure of the
>database in any way.
>
>Currently, we are thinking of storing this limit in a table in the database
>and encrypting the contents of each field using the Microsoft CryptoAPI.
>The VB components can then perodically decrypt the relavant fields (using a
>hardcoded key) and enforce the limit.
>
>How have others solved this problem? Any suggestions?
>
>Thanks,
>Brian
>
>
>
>
Received on Wed Jun 24 1998 - 00:00:00 CEST