With increasing competition for limited places, crammers have mushroomed and prospered by promising to give students an extra edge - training them with the sole aim of cracking the entrance test.
It also participates in cracking down on international crime and provides expert services for industrial counter-intelligence and personal background checks.
This has been achieved recently using a polyurethane derivative, with beads of monomer embedded in the material that become opened upon cracking of the material.
