PIN+ is a product family of theVaulters’ multi-factor authentication system. By adding other security means to personal information number (PIN), PIN+ drastically increases its security strength with minimizing users’ irritation.

PIN+F (a.k.a. Faceword)

PIN+F is built on the GPT scheme (shown in here).

— Thanks to JinChun and HyeJin.

PIN+AR (a.k.a. XAuth)

4X4 Numberic version

QWERTY version