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Covert channels via the widely used TCP/IP protocols have become a new challenging issue for network security. In this paper, we analyze the information hiding in TCP/IP protocols and propose a new effective method to detect the existence of hidden information in TCP initial sequence numbers (ISNs), which is known as one of the most difficult covert channels to be detected. Our method uses phase space...
The Session Initiation Protocol (SIP) is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol (IP). With wide applications of SIP, hiding secret data in some SIP header fields becomes a potential threat to many applications using SIP. In this paper, chaos theory is applied to analyze normal SIP traffic and a feature...
VoIP (Voice Over IP) was ranked third among the top 11 technologies of the decade in 2011. It is one of the most popular networking services. As it is readily adopted, the VoIP traffic is increasing steadily. The large amount of data transported by VoIP makes it ideal for creating covert channels. Attacks based on covert channels becomes a new challenge for network security. In this paper, possible...
When adopting Carrier Aggregation (CA) in the LTE-Advanced Systems, it needs Joint Scheduling crossing multiple Component Carrier. For Component Carrier (CC) located in different frequency band, this issue presented a new Component Carrier selection algorithm-Similar Proportional Fairness (SPF) algorithm which is based on traditional scheduling algorithm of Proportional Fairness (PF) in crossing CC...
Covert channels via the widely used TCP/IP protocols have become a new challenge issue for network security. In this paper, we propose an effective method to detect the existence of hidden information in TCP ISNs (Initial Sequence Numbers), which are known as the most difficult covert channels to be detected. Our method uses phase space reconstruction to characterize dynamic nature of ISNs. A statistical...
The session initiation protocol (SIP) is considered as the dominant signaling protocol for calls over the Internet. However, how to authenticate each other and agree on a session key has not been efficiently solved. In 2007, Wang and Zhang proposed a key agreement protocol and a new authentication and key agreement mechanism for SIP. In this paper, we prove that Wang and Zhang's key agreement protocol...
As various applications of SIP-based VoIP networks have been proposed, security has become one of the big research challenges and is receiving increasing attention. In this paper, we present a certificate-based two party authentication key agreement protocol for SIP-based VoIP networks and prove its security in the random oracle model. Additionally, our scheme could be used for multiple CAs environment...
With the development of e-commerce, electronic payment systems based on the Web have become a research hotspot. Most current payment models are based on the single bank, and e-cash has a lack of transparency and interoperation generally. Therefore, we put forward a distributed electronic payment system model based on bank union. It adopts a two-level secure architecture to guarantee the security of...
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