Brownian motion of particles suspended in a fluid is studied, and expressions derived for the particle diff usivity and velocity autocorrelation function. The theory of thermal noise in a general linear system is applied to both the particl

With the burst of a Wanna decryptor [1] in the middle of 2017, secure communication within a network [2] has again triggered the considerable attention. Meanwhile, many feasible methods have been proposed to enhance the data security and it is also