TellerPass is a 3.5kbyte SIM Card applet for GSM phones, which dynamically generates cryptographically secure PIN passwords that get changed every 30 sec, and are used only once. These PINs can be utilized to access
bank accounts through ATM kiosks, or web-banking and phone-banking sessions.

TellerPass is engineered to run in-synch with banking login servers,using an autonomous and link-free architecture. PIN generation and check is performed using synchronous distributed digital signatures. TellerPass bypasses the man in- the-middle attack shortfall of conventional hardware OTP (One-Time-Pin) generators. TellerPass applets from many different banking issuers can co-exist securely inside a SIM card, adding a strong layer of security in the administration and use of multiple banking account PINs.