The LILI-II keystream generator is a LFSR based synchronous stream cipher with a 128 bit key. LILI-II is a specific cipher
from the LILI family of keystream generators, and was designed with larger internal components than previous ciphers in this
class, in order to provide increased security. The design offers large period and linear complexity, is immune to currently
known styles of attack, and is simple to implement in hardware or software. The cipher achieves a security level of 128 bits.