![]() ![]() The privacy server removes potential user identifiers and forwards the encrypted hash prefixes to the Safe Browsing server via a TLS connection that mixes requests with many other Chrome users. If the visited URL is not in the cache, it may be unsafe, so a real-time check is necessary.Ĭhrome obfuscates the URL by following the URL hashing guidance to convert the URL into 32-byte full hashes.Ĭhrome truncates the full hashes into 4-byte long hash prefixes.Ĭhrome encrypts the hash prefixes and sends them to a privacy server. When you visit a site, Chrome first checks its cache to see if the address (URL) of the site is already known to be safe (see the “Staying speedy and reliable” section for details). Here is how Google describes this process: Google goes to great lengths to explain how this system can work in real time without sharing your browsing data with the company. The standard protection mode does not use these AI features. The Enhanced Mode was always opt-in, though - and will remain so (even as Google started to nudge people into turning it on last year). ![]() This mode also compares the URL you are visiting with a real-time list online, but it also uses AI to block attacks that aren’t on any list, performs deeper file scans and includes protection from malicious Chrome extensions. Now, if all of this sounds a bit familiar, then that’s likely because you are already familiar with the Safe Browsing Enhanced Mode. Google is rolling out this new system to desktop and iOS users now, with Android support coming later this month. These local lists have also grown in size, putting more of a strain on low-end machines and low-bandwidth connections. The company claims that this new server-side system can catch up to 25% more phishing attacks than using local lists. The advantage of this is that it doesn’t take up to an hour to get an updated list because, as Google notes, the average malicious site doesn’t exist for more than 10 minutes. Now, Chrome will move to a system that will send the URLs you are visiting to its servers and check against a rapidly updated list there. Previously, Chrome downloaded a list of known sites that harbor malware, unwanted software and phishing scams once or twice per hour. Google announced a major change to its Safe Browsing feature in Chrome today that will make the service work in real time by checking against a server-side list - all without sharing your browsing habits with Google. ![]()
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