Only enterprise user needs to register your device. You can skip registering your device, if you don't need it. The IIJ SmartKey app produces one-time passwords that conform to TOTP (RFC 6238) standards and can be used in the 2-step verification authentication processes of a variety of online services supporting TOTP. Strengthen your online service security by linking this app, installed to your smartphone device, with your ID/password verification processes. Slide authentication can be used (