International Journal of Computer Applications
In this information technology era, enterprise needs the automation of every system get the competitive advantage and multidimensional growth of the business. For this every enterprise need to observe the incoming and outgoing time of every employee and to stop the entry of unauthorized persons. For this many automated and manual systems are available like smart card, RFID, manual ID card, thumb impression techniques, etc. Every technique has its advantages and disadvantages. But the biggest problems with these system is that employees have to carry a number of electronic devices (PDA, Mobile Phone, Smart card, Library card, ATM Card, Credit Card, etc) with them for different purposes. Carrying many e-devices/e-cards is not comfortable for a person.