The public needed more "feedback and interaction" when using services, such as crime maps and giving parents online details of children's progress at school, he added.
The certificates are important, he said, because secure use of web shops and other services revolve around interaction between the "master keys" and the lower level security credentials.
And while the app revolution started with the easy stuff like games, social interaction, Instagram-like photo services, making newspapers easier to read mobile, or restaurants easier to schedule, apps now migrate to seeing, controlling and scheduling everything in the interstices of our economy, including things like automotive and aircraft maintenance.