How the website prevents the registration machine from being registered maliciously

Website Registration Malicious Registration policy

1. Intentionally designed cookies registration record the current registration time if n times a day, then the registration is forbidden; some registrars do not refresh cookies
2. Verification code policy. Design a sufficiently complex verification code;
A.gif Verification code picture, GIF captcha image output answer
B. Fill in the problem with the verification code
C. Use the Captcha feature font package. Use featured fonts to increase the difficulty of registering machine text recognition
D. Verification code using Chinese character mode
E. Verification Code selector mode, floating window set 9 Gongge, let the user click 9 Gongge Kanji Select 4 verification code word. If the verification code is incorrect, regenerate the 9
6.ip decision recognition More (this is already chicken, basically invalid)
7. Prohibit cross-domain registration, off-site submission, authorized domain name jump registration mechanism.
8. Sign up for email self-audit
5. Mobile Registration Verification Code recovery mechanism