So I am playing around with fiddler web proxy. I need to decrypt https traffic. So I am trying to put the fiddler root CA cert in my device trust store. But it keeps asking me <
I could now install the certificate. I had to disable pattern screen lock and try installing certificate again. This time it asked me to setup security - pin or password.
That I did and cert got installed. Got the solution from android central forum.
http://forums.androidcentral.com/google-nexus-7-tablet-2012/301151-credential-storage.html
I guess that thread is for VPN but same solution works for Wifi certs as well. Please do add if anyone has any additional info on this or workaround.
you must create a password to block/unblock smartPhone, Not PIN, maybe Patter, I try set a password and works fine