But, there are definitely ways to make it more difficult to do. You suggested one, by having a valid email address and requiring a click through to activate the account from the message. Cookies can be deleted far too easily, or completely turned off, to make them effective. Another avenue to look at may be flash. You could use a Local Shared Object to store the user's unique identifier. The LSO is a little more difficult to get to and remove than a cookie is and it will persist even if the local template cache is deleted. You could use that and some javascript, via FSCommand to populate a hidden form field with the userID stored in the LSO and submit that with their "new account request", or just use a custom flash form for the login and submit it all at once. If a new account request comes in with an already valid identifier, then you know it's a second account by the same user. Of course, this can be circumvented as well, but the user will need to be a little more savvy in the ways of web development to get around it... Do you know where your local shared object cache is on your computer???
Cheers, Jeff Garza -----Original Message----- From: Snake [mailto:[EMAIL PROTECTED] Sent: Sunday, October 09, 2005 7:58 AM To: CF-Talk Subject: RE: CFID There is no infallible way to stop this. You can only track someone by the information that is available to you, i.e. a cookie or an IP address. But cookies can be deleted and IP's can change, so then you no longer have a way to know that person has visited the site before. The best you can do is validate peoples email addresses, i.e. email them and get them to click a link before you activate their account. But that doesn't stop them signing up multiple times with multiple emails. Being able to track someone's activity without them being able to stop you would be an invasion of privacy, and I am certainly glad it is not possible. Russ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:220507 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
