reCAPTCHA: Easy on Humans, Hard on BotsreCAPTCHA uses an advanced risk analysis engine and adaptive challenges to keep malicious software from engaging in abusive activities on your website. Meanwhile, legitimate users will be able to login, make purchases, view pages, or create accounts and fake users will be blocked.
【スパム 対策】勝手に貼られた被リンク チェックとリンクを否認する方法 - ウェブと食べ物と趣味のこと
