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What do you think would happen if someone accesses a site that has the HTST mechanism enabled, for the first time? Would SSL Stripping still be possible?

marked as duplicate by WhiteWinterWolf, Rory Alsop Jan 18 '16 at 11:17

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Some browsers includes a mechanism named "HSTS preload", which consists of a list of sites which uses HSTS to avoid this "first-access" attack.

Google made a website which can be used to request the insertion of your website in those lists.

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