  The online social networks facilitate naturally for the users to share
information. On these platforms, each user shares information based on his or
her interests. The particular information being shared by a user may be
legitimate or fake. Sometimes a misinformation, propagated by users and group
can create chaos or in some cases, might leads to cases of riots. Nowadays the
third party like ALT news and Cobrapost check the information authenticity, but
it takes too much time to validate the news. Therefore, a robust and new system
is required to check the information authenticity within the network, to stop
the propagation of misinformation. In this paper, we propose a blockchain based
framework for sharing the information securely at the peer level. In the
blockchain model, a chain is created by combining blocks of information. Each
node of network propagates the information based on its credibility to its peer
nodes. The credibility of a node will vary according to the respective
information. Trust is calculated between sender and receiver in two ways:(i)
Local trust used for sharing information at the peer level and (ii) global
trust is used for a credibility check of each user in the network. We evaluate
our framework using real dataset derived from Facebook. Our approach achieves
an accuracy of 83% which shows the effectiveness of our proposed framework.
