[[["์ดํดํ๊ธฐ ์ฌ์","easyToUnderstand","thumb-up"],["๋ฌธ์ ๊ฐ ํด๊ฒฐ๋จ","solvedMyProblem","thumb-up"],["๊ธฐํ","otherUp","thumb-up"]],[["์ดํดํ๊ธฐ ์ด๋ ค์","hardToUnderstand","thumb-down"],["์๋ชป๋ ์ ๋ณด ๋๋ ์ํ ์ฝ๋","incorrectInformationOrSampleCode","thumb-down"],["ํ์ํ ์ ๋ณด/์ํ์ด ์์","missingTheInformationSamplesINeed","thumb-down"],["๋ฒ์ญ ๋ฌธ์ ","translationIssue","thumb-down"],["๊ธฐํ","otherDown","thumb-down"]],["์ต์ข ์ ๋ฐ์ดํธ: 2025-09-04(UTC)"],[],[],null,["# Overview of Web Risk\n====================\n\nWeb Risk is a new enterprise security product that lets your client\napplications check URLs against Google's\nconstantly updated lists of unsafe web resources. Examples of unsafe web\nresources are social engineering sites, like phishing and deceptive sites, and\nsites that host malware or unwanted software. Any URL found on this list is\nconsidered unsafe. Google works to provide the most accurate and up-to-date\ninformation about unsafe web resources. However, Google cannot guarantee that\nits information is comprehensive and error-free: some risky sites may not be\nidentified, and some safe sites may be classified in error.\n\nTo determine if a URL is on any of the lists, clients\ncan use either the Lookup API or the Update API .\n| **Note:** The information returned by the Web Risk must not be redistributed.\n\nLookup API\n----------\n\nThe Lookup API lets your client applications send URLs to the\nWeb Risk server to check their status. This API is simple and easy\nto use, because it avoids the complexities of the Update API.\n\n### Advantages\n\n- **Simple URL checks**: You send an HTTP GET request with the actual URL, and the server responds with the state of the URL (safe or unsafe).\n\n### Drawbacks\n\n- **Privacy**: URLs aren't hashed, so the server knows which URLs you look up.\n- **Response time**: Every lookup request is processed by the server. We don't provide guarantees on lookup response time.\n\nIf you aren't too concerned about the privacy of the queried URLs, and you can\ntolerate the latency induced by a network request, consider using the Lookup API\nbecause it's easier to use.\n\nUpdate API\n----------\n\nThe Update API lets your client applications download and store hashed versions of the\nunsafe lists in a local database, and check them locally. Only if a\nmatch is found in the local database does the client need to send a request to\nthe Web Risk servers to verify whether the URL is included on the unsafe\nlists. This API is more complex to implement than the Lookup API, but enables local\nlookups in most cases so it's faster.\n\n### Advantages\n\n- **Privacy**: You exchange data with the server infrequently (only after a local hash prefix match) and using hashed URLs, so the server never knows the actual URLs queried by the clients.\n- **Response time**: You maintain a local database that contains copies of the Web Risk lists; they do not need to query the server every time they want to check a URL.\n\n### Drawbacks\n\n- **Implementation**: You need to set up a local database and then download, and periodically update, the local copies of the Web Risk lists (stored as variable-length SHA256 hashes).\n- **Complex URL checks**: You need to know how to canonicalize URLs, create suffix/prefix expressions, and compute SHA256 hashes for comparison with the local copies of the Web Risk lists and the Web Risk lists stored on the server.\n\nIf you are concerned about the privacy of the queried URLs or the latency\ninduced by a network request, use the Update API.\n\nWhat's next\n-----------\n\n- Learn how to [set up Web Risk](/web-risk/docs/quickstart)."]]
