http://loyaltylobby.com/2015/03/13/update-hilton-hhonors-dropping-pins-1000-points-for-updating-password-march-12-24-2015-new-dates/
Today, to ensure maximum security, Hilton announced that the login process for all Hilton HHonors members is being updated. PIN numbers will no longer be accepted and members will have until March 25, 2015, to create a new password or update their existing