In the advanced cloud computing world Data sharing has never been easier task. Data communication with a large number of participants must take into account several issues, including efficiency, data integrity and privacy of data owner. Cellular automata image is a promising candidate to construct an anonymous and authentic data sharing system. The segmented allows a data owner to anonymously authenticate his data which can be put into the different places of cloud for storage or analysis purpose. Yet the costly certificate verification in the traditional public key infrastructure (PKI) setting becomes a bottleneck for this solution to be scalable. Forwarded Identity-based (IDbased) ring signature which eliminates the process of certificate verification, can be used instead. In this paper, we further enhance the security of Forwarded ID-based ring signature by providing with segmented cellular automata scheme. If a secret key of any user has been compromised, all previous generated segments that include with a user still remain valid. This property is especially important to any large scale data sharing system, as it is impossible to ask all data owners to re authenticate their data even if a secret key of one single user has been compromised. We provide a concrete and efficient instantiation of our scheme, prove its security and provide an implementation to show its practicality.