Judicial security is the proper quality of the performance of the courts in applying legal executive guarantees in order to prevent citizens from violating their laws and obligations, and it is a process for dealing with a fair and just judicial system in which everyone has access to it and the rights and freedoms of citizens are properly secured. The purpose of the current research is to examine and explain the juridical and legal foundations of judicial security in the process of providing a fair trial, which has been addressed with a descriptive and analytical method. The question is, what are the most important jurisprudential and legal foundations of judicial security in ensuring a fair criminal trial process? The results show that fair trial and its related criteria are one of the indicators that increase the confidence factor and sense of security of citizens towards judicial and police authorities. Jurisprudentially and legally, judicial independence, impartial proceedings, compliance with civil and defense rights of the litigants, provision of witnesses and finally compliance with the principles governing the proof of litigation, guarantees judicial security and leads to fair proceedings and justice implementation.