What is ipcress meaning?

The term "Ipcress" is the title of a popular 1962 spy novel by Len Deighton which later became a movie starring Michael Caine. There is no specific meaning for the term "Ipcress" as it is a fictional name created by the author for the novel. However, in the story, Ipcress is the code name for a top-secret espionage project that involves brainwashing and mind control techniques. The term has since been used in popular culture to refer to any top-secret or classified government project.