RFID encryption scheme featuring pseudorandom numbers and Butterfly seed generation

The emphasis on security in Radio Frequency Identification (RFID) systems is increasing with each passing day, owing to their corresponding increase in popularity in defence, anti-counterfeiting, logistics and medical applications. However, resource restrictions on RFID tags curtail the use of sophisticated algorithms to achieve better security, and therefore, privacy. Much of the current work has focused on either creating new lightweight cryptosystems specifically for RFID applications or adapting some of the existing techniques for use in RFID applications. Our proposal is a new encryption scheme that uses pseudorandom number generators, a strategic way of updating their seeds and system state identifiers to accomplish security. The focus of our work has been better security, with re-use and simplicity. We evaluate our work using simulation, protocol analysis and security analysis.