We design a practical and provablysecure block ciper over small domain and non-binary inputs,which is also can be considered as a pseudorandom permutation on N elements.Our work is based on a relation we found between...We design a practical and provablysecure block ciper over small domain and non-binary inputs,which is also can be considered as a pseudorandom permutation on N elements.Our work is based on a relation we found between the small domain ciper and the negative hypergeometric probability(NHG) distribution.We prove that our block ciper achieves ideal security,that is,it is indistinguishable from a random permutation even if the adversary had already observed N plaintext-cipertext pairs.In particular,we initiate an efficient and sufficiently precise sampling algorithm for negative hypergeometric distribution.展开更多
In the era of urban stock development,advocatinglow-carbontravelandreducing transportation carbon emissions will help promote the realization of the “dual carbon” goal. Based on the urban planning and design concept...In the era of urban stock development,advocatinglow-carbontravelandreducing transportation carbon emissions will help promote the realization of the “dual carbon” goal. Based on the urban planning and design concept of “small block, dense road network”, the paper analyzes the cases of low-carbon transportation-oriented road network planning and construction in the Netherlands,and summarizes the design concept and implementation method of road network planning of public transportation and slow traffic friendly blocks. The successful experiences of low-carbon transportationoriented city construction in the Netherlands are summarized, in order to provide the reference for lowcarbon urban development in China.展开更多
Visible light positioning （VLP） is an emerging candidate for indoor positioning, which carl simultaneously meet the requirements for accuracy, cost, coverage area, and security. However, intercell interference causc...Visible light positioning （VLP） is an emerging candidate for indoor positioning, which carl simultaneously meet the requirements for accuracy, cost, coverage area, and security. However, intercell interference causcd by light intensity superposition linfits the application of VLP. In this Letter, we propose a united block sequence mapping （UBSM）-based VLP that utilizes superposition to integrate the multidimensional information from dense small cells into 2D information. The experimental result shows that UBSM-based VLP can achieve an accuracy of 1.5 cm with a 0.4 m row spacing and 0.35 m column spacing of LED lights.展开更多
基金National 973 Fundamental Basic Research Program under grant No.2014CB340600 and by the National Natural Science Foundations of China
文摘We design a practical and provablysecure block ciper over small domain and non-binary inputs,which is also can be considered as a pseudorandom permutation on N elements.Our work is based on a relation we found between the small domain ciper and the negative hypergeometric probability(NHG) distribution.We prove that our block ciper achieves ideal security,that is,it is indistinguishable from a random permutation even if the adversary had already observed N plaintext-cipertext pairs.In particular,we initiate an efficient and sufficiently precise sampling algorithm for negative hypergeometric distribution.
基金Sponsored by General Project of Natural Science Foundation of Beijing City (8202017)Youth Talent Support Program of 2018 Beijing Municipal University Academic Human Resources Development (PXM2018_014212_000043)。
文摘In the era of urban stock development,advocatinglow-carbontravelandreducing transportation carbon emissions will help promote the realization of the “dual carbon” goal. Based on the urban planning and design concept of “small block, dense road network”, the paper analyzes the cases of low-carbon transportation-oriented road network planning and construction in the Netherlands,and summarizes the design concept and implementation method of road network planning of public transportation and slow traffic friendly blocks. The successful experiences of low-carbon transportationoriented city construction in the Netherlands are summarized, in order to provide the reference for lowcarbon urban development in China.
基金supported in part by the National 973Program of China(No.2013CB329205)the National Science Foundation of China(No.61401032)
文摘Visible light positioning （VLP） is an emerging candidate for indoor positioning, which carl simultaneously meet the requirements for accuracy, cost, coverage area, and security. However, intercell interference causcd by light intensity superposition linfits the application of VLP. In this Letter, we propose a united block sequence mapping （UBSM）-based VLP that utilizes superposition to integrate the multidimensional information from dense small cells into 2D information. The experimental result shows that UBSM-based VLP can achieve an accuracy of 1.5 cm with a 0.4 m row spacing and 0.35 m column spacing of LED lights.
