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An improved Multi-server Authentication Scheme for Distributed Mobile Cloud Computing Services
( Azeem Irshad ),( Muhammad Sher ),( Hafiz Farooq Ahmad ),( Bander A. Alzahrani ),( Shehzad Ashraf Chaudhry ),( Rahul Kumar ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12
Mobile cloud computing (MCC) has revolutionized the way in which the services can be obtained from the cloud service providers. Manifold increase in the number of mobile devices and subscribers in MCC has further enhanced the need of an efficient and robust authentication solution. Earlier, the subscribers could get cloud-computing services from the cloud service providers only after having consulted the trusted third party. Recently, Tsai and Lo has proposed a multi-server authenticated key agreement solution for MCC based on bilinear pairing, to eliminate the trusted third party for mutual authentication. The scheme has been novel as far as the minimization of trusted party involvement in authenticating the user and service provider, is concerned. However, the Tsai and Lo scheme has been found vulnerable to server spoofing attack (misrepresentation attack), de-synchronization attack and denial-of-service attack, which renders the scheme unsuitable for practical deployment in different wireless mobile access networks. Therefore, we have proposed an improved model based on bilinear pairing, countering the identified threats posed to Tsai and Lo scheme. Besides, the proposed work also demonstrates performance evaluation and formal security analysis.
( Azeem Irshad ),( Hafiz Farooq Ahmad ),( Bander A. Alzahrani ),( Muhammad Sher ),( Shehzad Ashraf Chaudhry ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12
Multi-server authentication enables the subscribers to enjoy an assortment of services from various service providers based on a single registration from any registration centre. Previously, a subscriber had to register from each service provider individually to avail respective services relying on single server authentication. In the past, a number of multi-server authentication techniques can be witnessed that employed lightweight and even computationally intensive cryptographic operations. In line with this, Zhu has presented a chaotic map based multi-server authentication scheme recently, which is not only vulnerable to denial-of-service attack, stolen-verifier attack, but also lacks anonymity. This research aims at improving the Zhu`s protocol in terms of cost and efficiency. Moreover, the comparative study is presented for the performance of improved model against the existing scheme, and the security of proposed model is formally proved using BAN Logic.
An improved Multi-server Authentication Scheme for Distributed Mobile Cloud Computing Services
Irshad, Azeem,Sher, Muhammad,Ahmad, Hafiz Farooq,Alzahrani, Bander A.,Chaudhry, Shehzad Ashraf,Kumar, Rahul Korean Society for Internet Information 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12
Mobile cloud computing (MCC) has revolutionized the way in which the services can be obtained from the cloud service providers. Manifold increase in the number of mobile devices and subscribers in MCC has further enhanced the need of an efficient and robust authentication solution. Earlier, the subscribers could get cloud-computing services from the cloud service providers only after having consulted the trusted third party. Recently, Tsai and Lo has proposed a multi-server authenticated key agreement solution for MCC based on bilinear pairing, to eliminate the trusted third party for mutual authentication. The scheme has been novel as far as the minimization of trusted party involvement in authenticating the user and service provider, is concerned. However, the Tsai and Lo scheme has been found vulnerable to server spoofing attack (misrepresentation attack), de-synchronization attack and denial-of-service attack, which renders the scheme unsuitable for practical deployment in different wireless mobile access networks. Therefore, we have proposed an improved model based on bilinear pairing, countering the identified threats posed to Tsai and Lo scheme. Besides, the proposed work also demonstrates performance evaluation and formal security analysis.
Irshad, Azeem,Ahmad, Hafiz Farooq,Alzahrani, Bander A.,Sher, Muhammad,Chaudhry, Shehzad Ashraf Korean Society for Internet Information 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12
Multi-server authentication enables the subscribers to enjoy an assortment of services from various service providers based on a single registration from any registration centre. Previously, a subscriber had to register from each service provider individually to avail respective services relying on single server authentication. In the past, a number of multi-server authentication techniques can be witnessed that employed lightweight and even computationally intensive cryptographic operations. In line with this, Zhu has presented a chaotic map based multi-server authentication scheme recently, which is not only vulnerable to denial-of-service attack, stolen-verifier attack, but also lacks anonymity. This research aims at improving the Zhu's protocol in terms of cost and efficiency. Moreover, the comparative study is presented for the performance of improved model against the existing scheme, and the security of proposed model is formally proved using BAN Logic.
Hussein Alrobei,Azeem Hafiz,Rizwan Ahmed Malik 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.5
This paper focuses on making a novel Lanthanum Phosphate-based durable and cost-effective crucible for high temperatureapplications such as fabrication processes of advance functional materials. A crucible is designed and fabricated by using threeparts die following by powder metallurgical technique. Stepwise sintering was used to sinter the crucible. The synthesizedcrucible was then exposed to several tests to assess its structure, surface topography, durability, thermal expansion, andthermal shock resistance. Thermogravimetric analysis revealed a smaller mass loss of about 9.7%. Scanning electronmicroscope (SEM) analysis showed a spherical structure with pores enough to make a compact structure. It is also observedthat the Lanthanum Phosphate-based crucibles have high non wettability after pouring out the molten magnesium and foundthermal shock resistant. Interestingly, the crucible retained its original shape without failure up to 4 cycles. These results showthat the synthesized Lanthanum Phosphate-based crucible is promising for high temperature applications.
Synthesis and mechanical characterization of alumina based composite material for armor application
Muhammad Shahid,Rizwan Ahmed Malik,Hussein Alrobei,Jaehwan Kim,Muhammad Latif,Azhar Hussaina,Muhammad Uzair Iqbal,Azeem Hafiz 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.2
This study focuses on development of advance ceramic with improved toughness which can be used as armor material forpersonnel protection. Toughness is the characteristics that defines material resistance to fracture. Ceramics are important classof materials with combination of good strength, toughness and with stand multiple-striking. In this study, three differentsamples i.e. alumina, Zirconia toughened alumina (ZTA), and alumina incorporated with SiC (SiCA); hexagonal shapesamples were made by dry pressing and sintered at 1600 oC in argon atmosphere. Microstructural characterization: SEM andOptical microscopy demonstrated fine grain size distribution in matrix phase. BSE images confirmed the presence of ZrO2particles. High porosity of about 6.35% was observed in SiCA samples. EDX analysis confirms the composition. Mechanicalcharacterization showed improved toughness at the expense of hardness. SiCA samples showed maximum value of hardnesswhile ZTA showed maximum toughness of 4.6 MPa·m1/2. The obtained properties are comparable to other ceramic materialsprepared by different methods.