The W3C quote immediately below makes distinct that this is not the situation; alternatively, the no-cache header just means that the response must be revalidated before remaining reused to provide subsequent requests. Working with no-retail outlet will protect against that response getting saved to disk or any non-unstable storage, and https://listingbookmarks.com/story21023238/%E3%83%93%E3%83%83%E3%83%88%E3%82%B3%E3%82%A4%E3%83%B3%E3%82%AB%E3%82%B8%E3%83%8E-an-overview