Your security and privacy are our top priority here at Shift. Shift uses the standard OAuth authorization protocol to ensure your private information is 100% secure while you are using Shift. Shift follows the OAuth protocol exactly as it was intended. OAuth authorizes Shift (locally) to access your emails and download to your local computer. An identity token is stored against your Shift account in the cloud, but the token required to access your emails is always local. Shift can handle your mail privately and locally without any risk that anyone, anywhere – other than you – can gain access to your information, data, or emails.