May I suggest three nice and easy option for prevent automatic captcha passing:
1. Make background with characters (but almost not visible). For automates it will be recognizable but human will read only those strong. To making this more complicated you can make two layers of captcha file ...
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- Fri Feb 06, 2009 2:48 pm
- Forum: [3.0/Olympus] New features discussion
- Topic: Visual Confirmation
- Replies: 101
- Views: 147360