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(web app) reading from registery in web??

Camillia asked
Last Modified: 2010-04-15
I'm working on a project...it's C#/WEB app...not a windows app. It's an ecommerce app and when user wants to check out, they enter a credit card number. Code goes thru a section that's looking for a registery on the user's machine. But this is a web app..you cant create registery on people's machine..that would be a security risk if an app allows a client browser to read/write to registry (is this correct?)

This is the line of code. I dont think a web app should be doing this...how can we create this registry entry on people's machine using web??
private static byte[] GetKeyFromRegistry()
            byte[] key = new byte[0];
            using (RegistryKey reg = Registry.LocalMachine.OpenSubKey(_keyRegistryPath, false))
                if (reg != null)
                    key = (byte[])reg.GetValue(_keyRegistryName, key);
            return key;

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