diff --git a/tuf/interposition/README.md b/tuf/interposition/README.md
index d6375169..8742b46b 100644
--- a/tuf/interposition/README.md
+++ b/tuf/interposition/README.md
@@ -1,4 +1,37 @@
-## Examples
+## Interposition
+
+Interposition is the high-level integration of TUF. 'updater.py' is used to   
+perform high-level integration of TUF to the software updater. This means     
+that all the processes which are taking place in the low-level integration    
+will be done automatically. This layer of processes will be transparent to    
+the client.                                                                   
+                                                                                
+Updater.py have two classes named as Updater and UpdaterController.           
+                                                                                
+tuf.interposition.updater.Updater contains those methods which are to be      
+performed on each individual updater. For example - refresh(), cleanup(),     
+download_target(target_filepath), get_target_filepath(source_url), open(url), 
+retrieve(url), switch_context(), all these for a particular updater.          
+                                                                              
+tuf.interposition.updater.UpdaterController contains those methods which      
+are performed on updaters as a group. It basically keeps track of all the     
+updaters. For example - add(configuration), get(configuration),               
+refresh(configuration), remove(configuration), all these are performed on the 
+list of updaters. tuf.interposition.updater.UpdaterController maintains a     
+map of updaters and a set of its mirrors. The map of updaters contains the    
+objects of tuf.interposition.updater.Updater for each updater. The set        
+contains all the mirrors. The addition and removal of these updaters and their
+mirrors depends on the methods of tuf.interposition.updater.UpdaterController
+
+### Integration with interposition example
+
+To implement interpostion, client only need to have the following-                           
+First, a client module which is modified to include interposition library and 
+code and second, a JSON configuration file is created, each of which is       
+explained below -      
+
+1. "interposition.py" is an example client updater module that is integrating 
+   TUF with interposition. 
 
 ```python
 import tuf.interposition