Country's premier cyber security agency CERT-In has cautioned customers, bankers and traders against skimming and malware attacks on micro ATMs and Point of Sale, POS terminals and asked them to adopt high-end encryption to plug possible breaches. <br/><br/>The move comes as usage of micro-ATMs and POS counters have witnessed a sharp surge post demonetisation. CERT-In has issued two specific advisories for micro-Automated Teller Machines and POS terminals.<br/><br/>The advisory states that as micro-ATMs work with minimal power and connect to central banking servers through a GPRS<br/>network, their security features need to be strong and updated to check attempts by hackers. <br/><br/>A social engineering attack can be engineered at these facilities, it added, by gaining trust of the owner as the fraudster poses as a member of staff. The agency has asked the banks and micro ATM operators to exercise some counter-measures to thwart such attacks. <br/><br/>It also suggested customers to render due diligence of securing their PIN and not sharing vital details with strangers.