[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-04 (世界標準時間)。"],[],[],null,["# reCAPTCHA keys overview\n\nThis document provides an overview of reCAPTCHA keys (also known as *keys*).\n\nA reCAPTCHA key is a unique, case-sensitive string\nof 40 characters that needs to be installed on web pages, in mobile\napplications, or at the WAF layer to integrate reCAPTCHA.\n\nA reCAPTCHA key returns a score for each request, which is based on the user\ninteractions with your site or application. By interpreting these scores, you\ncan take appropriate actions for your site or application, such as allowing or\nblocking users.\n\nExample reCAPTCHA key: `6Lcm3XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX5mfX`\n| **Note:** In some parts of the API reference documentation, reCAPTCHA keys are also referred to as *site keys*.\n\nreCAPTCHA keys can have one of the following integration types:\n\n- `SCORE`: Returns risk scores. It doesn't display the **I'm not a robot** checkbox and never shows CAPTCHA challenges.\n- `CHECKBOX`: Displays the **I'm not a robot** checkbox and might show CAPTCHA challenges after the checkbox is checked.\n- `POLICY_BASED_CHALLENGE` ([preview](/products#product-launch-stages)): Triggers CAPTCHA challenges based on a score threshold and challenge difficulty.\n- `INVISIBLE`: Doesn't display the **I'm not a robot** checkbox, but might show CAPTCHA challenges after risk analysis.\n\nThe following table lists reCAPTCHA keys that are supported for each platform:\n\n\u003cbr /\u003e\n\nWhat's next\n-----------\n\n- [Choose the appropriate reCAPTCHA key type for your platform](/recaptcha/docs/choose-key-type)"]]
