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Increasing demands for high-speed broadband wireless communications with voice over long term evolution (LTE), video on demand, multimedia, and mission-critical applications for public safety motivate 4th-generation (4G) and 5G communication development. The flat IP-based LTE and LTE-Advanced technologies are the expected key drivers for 5G. However, LTE, with its elapsed security mechanism and open...
Over-the-air reprogramming is a key service in wireless sensor networks. The service can disseminate a new code image to every sensor node in the network. For security reasons, every code image must be authenticated to prevent an attacker from installing its code to the network. In this paper, an authentication method named Hierarchical Hash Tree (HHT) is proposed to reduce the overheads of Sreluge,...
Vehicular ad hoc networks aim at increasing passenger safety by exchanging warning messages between vehicles wirelessly. A main challenge is to resist to various malicious abuses and security attacks. However, any security mechanism comes with overhead. We analyze how the authentication algorithm ECDSA and the consensus mechanism impact the vehicular network performance and the braking distance. Processing...
Vehicular networks are one of the most challenging research areas in wireless ad hoc networks. The main benefit of this kind of communication is seen in active safety systems, which aim at increasing passengers' safety by exchanging warning messages between vehicles. A main goal is to resist to various malicious abuses and security attacks. The IEEE1609.2 standard for vehicular ad hoc networks is...
In this paper, we propose an optimized content-aware authentication scheme for JPEG-2000 streams over lossy networks, where a received packet is consumed only when it is both decodable and authentic. In a JPEG-2000 codestream some packets are more important than others in terms of coding dependency and visual quality. This inspires us to allocate more redundant authentication information for the more...
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