A Study on the Security Features of the Parlay API Based Application Behavior

New security requirements arise with the opening of telecommunication networks via APIs. This paper presents the risk analysis of network security caused by Parlay API and proposes a Petri net based approach to analyze application behavior when interacting with Parlay API. With a time constraint predicate/transition Petri Net modeling, normal behavior and abnormal behavior are distinguished. A fuzzy set with membership function is defined to measure possible abnormality degree of application's behavior