The ZyXEL One-Time Password (OTP) Solutions adopt two-factor authentication to strengthen the identification check and to prevent unauthorized access or theft to confidential data. ZyXEL's OTP Solutions include both physical and software generators: the ZyWALL OTPv2 and OTPv2 mobile token (OTP-MOBI). The ZyWALL OTPv2 is a compact, portable OTP authenticator, while the OTPv2 mobile token (OTP-MOBI) is a software application running on mobile devices to be used in combination of a password to empower employees, customers and partners to securely access data anytime, anywhere.