Security is considered as one of the basic elements of efficiency and providing services to citizens and beyond that, it is the survival of existing political systems. Crimes against security have always been an significant topic of discussion. The present paper is an attempt to examine the threats and crimes against security in the Iranian legal system and its future challenges. The present paper is an analytical descriptive study and using the library method to investigate the subject under study. The findings of the study show that cyber crimes, such as espionage and unauthorized cyber access are among the crimes against security that have been criminalized. But security is also exposed to other important cyber threats that pose future security challenges. Cyber terrorism, cyber warfare, cyber disruption and hacking, phishing, farming, and smashing are among the security threats that are considered as future challenges because of the unclear nature of cyber security challenges, and dealing with it requires criminal and non-criminal prevention.