Learn More
One of the most serious problems of smart card system such as Java card, is about an amount of insufficient memory. Moreover, most of the embedded devices with Java VM support the post-issuance of new applications. These applications are usually stored in the memory, which is usually EEPROM. The key idea of our approach is to reduce the size of CAP file by(More)
Recently, a number of studies are underway about the smart grid for the demand what efficient power management. For these power management in smart grid environments, there are required a system that it can be safely stored and sent various information. In this paper, the user oriented side will be discussed from among the systems that it can be controlled(More)
In addition to existing voice call service, the GSM platform has evolved to include various multimedia services and 3G services enabling international roaming. On that ground, safe data transmission and receiving technology and protection of privacy have become the key elements for the GSM service. However, many researchers have pointed out the problems(More)
In recent years, there are also actively being studied the applicable applications based on NFC that can apply as the form of convergence of the application. Typically, there are mobile payment services. This is because of technologies that it can ensure the efficiency of user's side and the safety of the important personal payment information. However,(More)