Hello,
Typically the way people deal with this is respond with 1 generic error message
for bad user/pass's and then stick up a captcha after X failures. Gmail does
a good job at demonstrating this.
Regards,
- Robert
http://www.webappsec.org/ The Web Application Security Consortium
http://www.cgisecurity.com/ Web application security news and more
Hi
I'm developing a application which requires users to sign up with both
a username and an email address. I only want an email address to sign
up once and don't want duplication of usernames.
If I just put up a warning stating that an email address is already
registered if it is, the form is open to being used for user
enumeration. Apart from using things like captchas to try to defeat
automated attacks, is there any way to stop this?
I know on things like forgotten password forms you can ask for extra
info so someone guessing would have to get both bits right but I can't
think of a way to do this here.
Robin
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