atm mini lock offers to ATM Network operators the best value mix for ATM top box access control, operational convenience and high field service quality. With atm mini lock, logistic of thousands of keys is no longer an issue and no worries about forgotten or lost keys. Scheduled visits or emergency calls, whenever it is needed, any authorized staff is able to access securely to an ATM top box by using an NFC mobile phone or by using a user specific one time code. ATM Security Becomes More Critical ATM PCs are Under High Risk. The outbreak of ATM malware attacks are spreading rapidly in worldwide. Most of these attacks are coming from or in relation with insiders. All are injected to the ATMs on site. However, ATM top boxes are currently protected with ordinary cam locks, mostly with master keys, which are easy to access. Higher Security with OTC atm mini lock offers better first line defense with OTC (one time codes). With atm mini lock, the person, location and time based one-time-codes are generated and distributed centrally only to the authorized field operators to unlock a specific atm mini lock within a specific time interval. Each atm mini lock has its own unique ID and unique lock key (ULK). ULKs can be securely updated any time via NFC.High Technology atm mini locks are NFC enabled. As an alternative to manually supplied OTCs, field operators may easily open the locks themselves by using atm mini mobile application. Touch