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Updated SSDP Scheme for DDoS Attack Defense
( Haiou Huang ),( Liang Hu ),( Jianfeng Chu ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.9
Abusing the Simple Server Discovery Protocol (SSDP) can induce an SSDP attack (including SSDP DoS, DDoS, DRDoS) posing a significant threat to UPnP devices. Rapid and extensive developments in computer technology, especially in regards to IoT, have made Upnp devices an indispensable part of our daily lives - but also render them susceptible to a variety of SSDP attacks without suitable countermeasures. This paper proposes the Two-dimensional table scheme, which provides high security at a reasonable computational cost. The feasibility and effectiveness of the proposed scheme are also validated by comparison against four other schemes (Stateless connections, Failing-together, Cookie, and Client puzzle).
Jie Bai,Liping Guo,Haiou Liang,Tong Xu,Chunping Li,Qingrun Meng,Huan Liu,Yarong Huang 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.12
Well-dispersed palladium nanoparticles (Pd NPs) were prepared under the condition that trisodium citrate was the reduction agent and polyvinylpyrrolidone (PVP) was the stabilizing agent via sol-gel process. By making good use of the advanced electrospinning technology we obtained Pd NPs/PVP composite nanofibers films. Optical properties were examined by UV-visible absorbance spectra (UV-vis) and Fourier transform infrared spectroscopy (FTIR). The morphology and distribution of Pd NPs in/on PVP matrix were characterized by scanning electron microscope (SEM)and transmission electron microscope (TEM). The results showed that Pd NPs presented as spherical spots and distributed in/on PVP nanofibers uniformly; their diameter was 4-10 nm and decreased with the increase of PVP. The as-prepared Pd NPs/PVP hybrid mats possess catalytic activity, stability and reusability, as verified by performance in Heck reaction.