1) The document discusses using image processing techniques like fingerprint scanning, iris scanning, and face recognition for secure authentication in automated teller machines (ATMs).
2) It analyzes different biometric methods and proposes two algorithms that use biometrics like fingerprints for verification to prevent fraudulent ATM access and reduce attacks on the system.
3) The algorithms are meant to provide a higher level of security compared to existing ATM systems by making the ATM only accessible based on biometric matching, though implementing such a system comes at a higher cost.