Necessary (mandatory)</strong>: Necessary cookies are required to enable basic features of this site, such as providing safe and secure log-in, adjusting your consent preferences and establishing overall security and integrity of PURE.</li> </ul> <p>In order to provide this we use cookies and other devices such as CAPTCHAs, we also use persistent cookies, which enable us to identify whether the device on which a login is attempted is the same as the device that is linked to the user's account. These types of cookies also help with our anti-spam measures and help us to prevent phishers, scammers, unauthorized login attempts to your account, and access to any hacked accounts.