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Wireless LANs have been widely used to carry out a system to access Internet. WLAN security becomes mission one, especially a new type of attacks called covert channel based attack surfaced over the past few years. This attack uses different data rates provided in WLAN to transmit a secret message. Detecting this covert channel could be difficult due to existence of rate diversity in 802.11 WLAN....
Based on phase retrieval algorithm and QR code, a new optical encryption technology that only needs to record one intensity distribution is proposed. In this encryption process, firstly, the QR code is generated from the information to be encrypted; and then the generated QR code is placed in the input plane of 4-f system to have a double random phase encryption. For only one intensity distribution...
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...
Webpage based information hiding technology uses a webpage as the cover object. The research of this area has led to several different techniques, which can be broadly classified into embedding invisible characters based, switching the uppercase-lowercase states of letters in tag based, and altering the order of attributes based. Based on the attributes order, a scheme of information hiding is presented...
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...
Based on Cheng-Liu-Wang identity-based signature scheme and Baek-Zheng pairing-based verifiable secret sharing scheme, a new secure monitoring scheme using identity-based threshold signcryption scheme for wireless sensor networks is proposed. The goal of this scheme is to provide a confidential and authenticated transmission channel for monitoring messages sent by nodes to BS over an insecure wireless...
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...
In Eurocrypt 2003, Gentry introduced the notion of certificate-based encryption, which combines traditional pubic key encryption (PKE) with identity-based encryption (IBE) while preserving most of the advantages of each, such as no private key escrow and less PKI infrastructure. In this paper, we propose the security notion of certificate-based signcryption and present a concrete certificate-based...
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