  Chaotic behavior arises from very simple non-linear dynamical equation of
logistic map which makes it was used often in designing chaotic image
encryption schemes. However, some properties of chaotic maps can also
facilitate cryptanalysis especially when they are implemented in digital
domain. Utilizing stable distribution of the chaotic states generated by
iterating the logistic map, this paper presents a typical example to show
insecurity of an image encryption scheme using chaotic logistic map. This work
will push encryption and chaos be combined in a more effective way.
