GridGuard by SyferLock is a software-based two-factor and multi-factor authentication solution that provides next-generation One-Time Passwords/PINs (OTPs) for secure access to computers, networks, and the Internet. GridGuard converts static passwords into dynamic One-Time Passwords using a substitution cipher, replacing static passwords with randomly changing numbers at each login. It offers a zero-footprint aspect, generating device-less One-Time Passwords/PINs without additional client-side hardware or software, and without dependency on a cell phone.
