Online Auction Security and Fraud Prevention

Auctions Security and Fraud Prevention Tools

Auction websites are almost constantly under some sort of a hacker attack.
We have developed the following tools in order to prevent a fraud attempt or any other security challenge:

Registration Security measures
1.    Only one user
2.    IP logged. Admin is notified when too many registration attempts are coming from the same IP within a certain time frame.
3.    IP blocking (Range or individual)
4.    Domain name blocking (emails containing xxx.com can be blocked)
5.    CAPTCHA (Challenge – Response). This prevents automatic registration
6.    Setting a limit on the number of credit cards that can be used by a single user
7.    Setting a limit on the number of credit card charges that can be used by a single user
8.    Automatic alerting XSS & MySQL Injections