The digital signature technology for access control system of mobile

In recent years, the popularity of mobile application. the NFC cards can do are also increasing in recent years. However, security problems may be getting more and more serious in such NFC applications. Thresholds of making the counterfeit card are getting lower and lower, hacker or intruder may also easily use illegal software or tools to imitate other people's cards. Once a NFC card with multiple functions is lost, there may be serious problems of not only the loss of money, but also the risk for security. In This Paper, we use mobile phones to design a set of digital signage-based access control card system, all clearance key can only be used once that is invalid. The advantage of this is to avoid the risk of the traditional magnetic key being copied during transmission, this technique is also different from the traditional rolling code magnetic card. hackers in the acquisition of multiple sets of numbers may be able to calculate the next set of possible numbers. We use digital signature technology is no rule can be calculated. In the remote open the door we also designed a one-time password. Allow visitors or temporary home family have a one-time open door permission. In the application of the hotel can also avoid the shortcomings of the traditional Key is copied, this technique requires only minor changes in existing access control systems, we will use this technology to illustrate the digital life of safer, more tech-savvy