Implementation of an Ultra-Lightweight Block Cipher

With the establishment of the AES (Advanced Encryption Standard) the need for new block ciphers has been greatly diminished; for almost all block cipher applications the AES is an excellent and preferred choice. However, despite recent implementation advances, the AES is not suitable for extremely constrained environments such as RFID(Radio Frequency Identification) tags and sensor networks. In this paper we describe an ultra-lightweight block ciphert. Both security and hardware efficiency have been equally important during the design of the cipher and at 1570 GE, the hardware requirements for this cipher are competitive with today’s leading compact stream ciphers. It is one of the most compact encryption methods ever designed and is 2.5 times smaller than AES. The block size is 64 bits and the key size can be 80 bit or 128 bit. It is intended to be used in situations where low-power consumption and high chip efficiency is desired. The International Organization for Standardization and the International Electro technical Commission included this block cipher in the new international standard for lightweight cryptographic methods.