The novel “Future Glitter”, also known as “Tyranopolis”, by A.E. van Vogt was published for the first time in 1973.
The whole world is under the dominion of dictator Lilgin and after some generations the total population control is complete thanks to a sophisticated mass surveillance system. When Professor Dun Higenroth invents the Pervasive System, which allows anyone to communicate remotely without the need for tools and to watch the watchers, the regime is in danger.
Dun Higenroth knows that the regime will do everything to take the secrets of the Pervasive System from him, even by extracting them directly from his brain. The only hope for a different future is to hide those secrets so that one day they can be used to overthrow the dictatorship.