LiCi: A new ultra-lightweight block cipher

In this paper, we have presented a new lightweight, low power block cipher “LiCi”. The cipher LiCi has Feistel based network which operates on 64 bits plain text and with the help of 128 bits key length it generates 64 bits cipher text. This cipher design shows good performance both on hardware as well as on software platforms. As compared to the existing cipher it requires less footprint area that consumes only 1153 GE's (Gate Equivalents) and has less memory requirements. It also consumes only 30mW which is less power as compared to the other existing ciphers. LiCi cipher needs only 1944 bytes of Flash memory which is very less memory size till date. In this paper, we proposed the security analysis as well as performance parameter of the LiCi. The LiCi cipher resists the linear and differential attack. It also shows the good resistance against the advanced attack like Biclique and Zero correlation. This cipher is well suited for application where small footprint area and low power dissipation are important design metrics.