K-times Proxy Re-encryption

Wang, Xu An; Wang, Ziqing; Ding, Yajie; Bai, S. Kamala

doi:10.1109/cis.2011.213

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…Also, the adsorption technology has proven to be a sustainable system that has important advantages such as being driven by waste heat and low-grade heat sources such as solar energy and using environmentally friendly refrigerants such as water [10]. In a basic adsorption system ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Experimental testing of aluminium fumarate MOF for adsorption desalination

et al. 2020

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Many researchers consider adsorption systems as a solution for global problems such as global warming and water scarcity. The experimental and numerical data available in literature are basically focusing on using conventional adsorbent materials such as silica gel and zeolites. Recently, metal-organic framework (MOF) materials has been proposed to substitute these conventional adsorbents. Nevertheless, the potential of MOFs has been only numerically investigated without any experimental data from a real system. To fill this research gap, this work presents for the first time the experimental testing of a MOF material, aluminium fumarate, and how it can affect and enhance the performance of adsorption desalination systems. A parametric study to investigate the effect of different parameters such as chilled water, adsorption cooling water, condensation cooling water, desorption heating water temperatures and half cycle time on the performance of the adsorption system was developed. The suitability of the aluminium fumarate system for adsorption desalination was also assessed through analysing the quality of water produced from the system. Finally, the performance of the aluminium fumarate was also compared to conventional adsorbents such as silica gel. The superior performance of aluminium fumarate highlights the potential of the material in adsorption desalination application.

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Section: Introductionmentioning

confidence: 99%

Experimental testing of aluminium fumarate MOF for adsorption desalination

et al. 2020

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“…Also, these systems were driven by electricity generated using fossil fuels. An alternative to the common cooling systems is adsorption technology which can be operated using waste heat or renewable energy sources (such as solar and geothermal energy) and uses environmentally friendly refrigerants such as water [6]. Adsorption desalination can also offer an innovative solution to another global crisis which is water scarcity [7] as by 2025, 1.8 billion human being will be living in absolute water scarcity regions [8][9][10].…”

mentioning

confidence: 99%

MIL-101(Cr)/calcium chloride composites for enhanced adsorption cooling and water desalination

Elsayed

Anderson

Al-Dadah

et al. 2019

Journal of Solid State Chemistry

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The adsorption capacity of adsorbent materials at low relative pressure range is a crucial parameter that guarantee the high overall performance and efficiency of adsorption cooling and water desalination systems. MIL-101(Cr) is a metal-organic framework (MOF) material with a high-water vapour uptake of 1.36-1.47 g 2 H O g ads-1. However, MIL-101(Cr) exhibits an IV isotherm (S-shaped isotherm) which means that the high-water uptake only takes place at high relative pressure (≥ 0.5). This drawback makes MIL-101(Cr) impractical for adsorption applications working at lower relative pressure such as adsorption cooling and desalination with cooling effect which operate at relative pressures ≤0.4. In this work, MIL-101(Cr)/CaCl 2 composites were synthesized, the unsupported and CaCl 2 supported materials were fully characterized in terms of their structure (XRD), thermal stability, vibrational spectroscopy structure, morphology (SEM), water adsorption capacity and BET surface area. As a result, incorporating CaCl 2 into the MIL-101(Cr) structure significantly enhanced water adsorption characteristics in the desired relative pressure range as the water vapour uptake for Comp_1:8 CaCl 2 composite increasing from only 0.1 g 2 H O g ads-1 for as-synthesized MIL-101(Cr) to 0.65 g 2 H O g ads-1 at a relative pressure of 0.3.

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“…Because the proxy storage server is intrusted, it is desirable to fully restrict the proxy's ability. To obtain this goal, Wang et al , constructed a k ‐times proxy re‐encryption in 2011, and subsequently Purushothama et al , designed a limited proxy re‐encryption (L‐PRE) for enforcing access control in public cloud in 2013. They borrow the ideas of k ‐times signature in and in .…”

Section: Introductionmentioning

confidence: 99%

A restricted proxy re‐encryption with keyword search for fine‐grained data access control in cloud storage

Chen

Huang

et al. 2016

Concurrency and Computation

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SUMMARYFor fine-grained data access control in cloud computing, for the first time, we introduce a new concept called restricted proxy re-encryption with keyword search, which combines the function of proxy re-encryption with keyword search and that of threshold cryptosystem. To demonstrate this concept, we present the formal syntax for restricted proxy re-encryption with keyword search, the security model, and a concrete construction. In our scheme, we take advantage of the techniques of threshold cryptosystem to restrict the capacity of the proxy cloud server, and in the meantime, we let the proxy cloud server can only re-encrypt the data containing a specified keyword, which matches the trapdoor from delegatee to provide an accurate access control for users. While in this process, the proxy cloud server learns nothing about the contents of data and keyword. Our scheme is proved to be semantically secure under the modified bilinear Diffie-Hellman assumption and the q-decisional bilinear Diffie-Hellman inversion assumption in the random oracle model. Finally, we apply the techniques in our scheme to some practical problems. Copyright

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K-times Proxy Re-encryption

Cited by 4 publications

References 18 publications

Experimental testing of aluminium fumarate MOF for adsorption desalination

Experimental testing of aluminium fumarate MOF for adsorption desalination

MIL-101(Cr)/calcium chloride composites for enhanced adsorption cooling and water desalination

A restricted proxy re‐encryption with keyword search for fine‐grained data access control in cloud storage

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