Criminal psychology, long taught under the heading of forensic psychology, remains a science that studies all the applications of psychology to forensic procedures for establishing, clearing or excluding incrimination. It is closely linked to criminal procedure and forensic science in that, unlike criminal procedure, which studies the set of legal rules that organize the way to proceed in establishing the facts of an offence and ends with the execution of the sentence by the convicted person, criminal psychology encompasses all the general knowledge relating to the conduct of a criminal trial. As for the relationship between criminal psychology and forensic science, it should be noted that one, criminal psychology, is a component of the other, forensic science, which focuses on all the processes involved in encrypting information to ensure confidentiality between sender and recipient (forensic medicine, forensic science, fingerprinting, ballistics, cryptography, etc.).