Google's Project Shield explained - what the industry thinks
Google proposing is not a threat to the established providers who would not expect to sell to the sort of organisations who will qualify for Project Shield. As for larger publishers, assuming they qualify, many will already have equivalent services in place with guaranteed service levels. As a free service, Shield makes no such promises and has no Service Level Agreements.
"This (website caching) can help against certain attack vectors, but it doesn't fully addresses the different DDoS threats that websites are facing today," commented Igal Zeifman of security firm Imperva whose Incapsula service offers DDoS mitigation.
Although not a independent voice in this issue, Zeifman does point out some limitations of the service.
"It cannot mitigate network layer attacks, especially direct-to-IP attacks that target specific IP addresses and elements of a network's infrastructure. There is also the question of attack duration, as many DDoS assault can be easily sustained for days, weeks or even months at a time. For attacks like these, serving stale cached content is a hard compromise, perhaps even more so for a news organisation."
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