Payload signature structure for accurate application traffic classification

Emergence of high-speed Internet and various smart devices has led to a rapid increase of applications on the Internet. In order to provide reliable services and efficient management of network resources, accurate traffic classification of various applications is essential. Through various methods of extraction when payload signatures are extracted, most of these payload signature formats are just strings or hex values which appear frequently within payloads. Thus, it is difficult to extract unique signatures for a specific application, because redundant signatures extraction is in most cases unavoidable. In this paper, we propose a more elaborative payload signature structure for accurate classification of each specific application. The formats of this signature structure is composed of three level signatures. These are Content signature which is single contiguous substring in payloads, Packet signature which is the sequence of Content signatures that appear in the same packet, and the Flow signature which is a sequence of Packet signatures that appear in the same flow. By applying and comparing the existing signature format and proposed signature format to the actual application traffic classification, we demonstrate the effectiveness of the proposed signature structure.