Add structure to 'Solution Overview'

README.md

@@ -26,5 +26,17 @@ capabilities-based access control, supports efficient VC revocation, and enables
 access over public, untrusted networks, aka Zero -Trust Architectures (ZTAs). 
 
 ## Solution overview
-The following figure illustrates the modules of our solution
-![ZeroTurstVC architecture](architecture.png "ZeroTurstVC architecture")
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+The following figure illustrates the modules of the ZeroTrustVC component.
+![ZeroTurstVC architecture](architecture.png "ZeroTurstVC architecture")
+
+A typical authorization flow in ZeroTrustVC includes the following steps
+
+### Issuer configuration
+with this step, a resource owner configures the authorization server with policies
+that specify the access rights that correspond to a client. Clients are identified
+using a public key (latter on this project we will consider cases where clients are
+identified by a Decentralized Identifier).
+
+### VC request and issuance
+
+### Resource request
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