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Lightweight Key Distribution Protocol for Streaming Media DRM
Hao Li,Tang Xuyue,Jiayin Tian,Jianbo Liu,Cheng Yang 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.9
In the daily-real systems, protecting the data only is far less enough. The process about the generation, distribution, storage, and the revocation of the key is the core problem in the system-security consideration. If the management of the key is insecure, attackers could easily get the key used in the encryption steps to the context, leading to useless processing in the encryption no matter how secure the system be. Unlike the period of validity for the different key, the key can easily be attacked by various methods due to its distribution through the complex net links, which would bring about the threatening of the security. In this paper, we analyze three models of the key distribution, associated with the actual applications for the encryption in the hypermedia video stream. Besides, we raise up a new protocol based on the IKEV2 distribution protocol and evaluate the stability when it suffer the Man-in –the-Middle Attacks, DoS and Replay attacks.
Object Tracking based on Relaxed Inverse Sparse Representation
( Junxing Zhang ),( Chunjuan Bo ),( Jianbo Tang ),( Peng Song ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.9
In this paper, we develop a novel object tracking method based on sparse representation. First, we propose a relaxed sparse representation model, based on which the tracking problem is casted as an inverse sparse representation process. In this process, the target template is able to be sparsely approximated by all candidate samples. Second, we present an objective function that combines the sparse representation process of different fragments, the relaxed representation scheme and a weight reference prior. Based on some propositions, the proposed objective function can be solved by using an iteration algorithm. In addition, we design a tracking framework based on the proposed representation model and a simple online update manner. Finally, numerous experiments are conducted on some challenging sequences to compare our tracking method with some state-of-the-art ones. Both qualitative and quantitative results demonstrate that the proposed tracking method performs better than other competing algorithms.
Tao Wan,Songsong He,Tairan Wang,Jian Wang,Mingrui Yu,Yang Jianbo,Qi Tang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.11
Polyethylenimine(PEI)-modified magnetic hydrogel nanocomposite absorbents (PEI-mHNAs) were fabricated based on poly(acrylamide-co-acrylic acid) and PEI-modified magnetic nanoparticles by radical copolymerization. FTIR and XRD results preliminarily confirmed the target structure of PEI-mHNAs without destroying the structure of magnetic nanoparticles during modification and radical copolymerization. PEI-mHNAs with many rough porous and interstitial structure had high adsorption capacity of Cu(II) (217mg/g), Cd(II) (232mg/g) and Pb(II) (459mg/g). PEI-mHNAs had the best absorption capacity for heavy metal ions in the synthesis condition of acrylic acid/acrylamide mass ratio of 60 : 40, 0.8% initiator, AA neutralization degree of 70%, 0.75% crosslinker, and 15% PEImodified magnetic nanoparticles. Moreover, PEI-mHNAs had good magnetic responsiveness, high thermal stability and reusability, which make it a potential application in removing heavy metal ions from the contaminated wastewater.