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Efficient and Anonymous Multi-Server Authentication and Key Agreement Protocol Framework

Thesis Info

Access Option

External Link

Author

Irshad, Azeem

Program

PhD

Institute

International Islamic University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Computer Science

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/12521/1/Azeem%20Irshad%20Thesis%20After%20Viva%20Revision28.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727743250

Similar


On our way to switching from single-server to multi-server authentication, one of the great challenges is to design a secure and computationally efficient multi-server authentication protocol. Multi-server Authentication (MSA) relieves the user of separate and individualized registration procedures from various service providers in a network. Following MSA paradigm, a user gets registered from a trusted authority first, and then the former may benefit itself from any service being offered by any service provider without registering again, engendering overhead efficiency. Another objective for switching towards multi-server architecture was to relieve the user of maintaining multiple passwords as much as the number of servers. A robust MSA architecture makes the access of sever-oriented network services not only convenient but also readily available for users. The remote internet authentication often entails the type of multiserver authentications, which further underscores the need of MSA protocol’s efficiency and robustness against threats. The service providers in an MSA-based network authenticate and verify the users on the basis of credentials provided by Registration Centre (RC) to the users during registration phase. In traditional MSA protocols, service providers consult online RC for verifying the user’s authenticity after receiving a login request. Besides, we witness MSA protocols where RC is bypassed during mutual authentication between user and service provider. The latter class of schemes takes less communicational cost and eliminates few bottlenecks, perceptibly, due to bypassing trusted RC from mutual authentication phase. The research academia came up with many authentication protocols lately, to enhance security and minimizing communicational overhead. However, the presented solutions are costly due to employing expensive bilinear operations, on the first hand. Besides, there are light-weight MSA protocols as well, nevertheless bearing many other drawbacks making those protocols unfit for practical implementations. We address these problems by presenting a novel multi-server authentication protocol framework that is not only efficient but also free of the hassle of key management and distribution problems. The protocol framework comprises a blend of the usage of selected crypto-primitives, messages and participating entities in such a way that leads to overall efficiency and achieves the security objectives as well. In this dissertation, we present state-ofthe-art review on MSA-based protocols and then propose corresponding protocols to address the above limitations. Our proposed work not only contributes a light-weight multi-server authentication protocol framework that could establish mutual authentication without RC engagement, but also improves upon many MSA schemes (Trusted and Non-trusted environment) to enhance security and reduce communication or computational delay for establishment of an authenticated session key between user and server. To prove the security claims, the formal security analysis is performed for each protocol and the results are also validated and verified using automated simulation tools.
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دنیا وچ ساتھی دنیا دار دے رہے

دنیا وچ ساتھی دنیا دار دے رہے
رنگ بھرے نیں رنگ پیار دے رہے

اِٹاں ریت دیاں اسیں رہے تھپدے
محل خیالاں دے نت اساردے رہے

بھانویں لکھ مصیبتاں سرے آئیاں
نام یار دا سدا چتار دے رہے

ساڈے نام توں شہر وچ بنے فاتح
تسیں جتدے رہے اسیں ہار دے رہے

تساں حاکماں نظر منظور ہوئے
اساں چپ رہے تساں مار دے رہے

تسیں ہور کسے دے رہے سنگتی
نال ہور دے عمر گزار دے رہے

سانوں غماں نیں آ برباد کیتا
تسیں خوشی تھیں پیر پسار دے رہے

ہک وار ڈٹھا اوس شوخ تائیں
کئی مدتاں نشے خمار دے رہے

اساں ترس گئے ہک دیدار خاطر
تساں زلف نوں نت سنوار دے رہے

لے، لیا، زلیخا نے جھٹ یوسف
خریدار تاں کئی بازار دے رہے

اساں اندروں قیس ہو گئے لیلیٰ
بھانویں روپ اتوں دنیا دار دے رہے

ماحولیاتی آلودگی اور تعلیمات نبویﷺ

For the guidance of all human being and for resolving the problems Allah has told in Qur’an.  The environmental pollution is a major issue of our life, Allah has also fully guided for this regard too. There is mentioned in The Holy Quran about that. There are seven types of pollution are: Water pollution, Air pollution, Soil pollution, Thermal pollution, Radioactive pollution, Noise pollution, Light pollution. Environmental pollution has existed for centuries but only started to be significant in dub trial resolution. Pollution occurs when the natural environmental cannot destroy an element without creating harm or damage to itself. The elements involved are not produced by nature and the destroying process can vary from a few days to thousands of years. Though the first we should clean our self then our society will be cleaned and will not remain any kind of pollution. In this regard the Holly Quran is also telling us about the purification. There are two types of purification internal external. Internal purification to purity the soul form the effects of sins and act of disobedience though repenting sincerely form all sins and act of disobedience Purification of the heart from the fifth polytheism. External purification by removing of filth is by using pure water of the water for the removal of the for the worshiper's garment body and from the place of prayer. We must thin for this serious issue and have to reform our society from this important issue. In fort, we get rid from those absolutely in the right direction.

Evaluation of Antimicrobial Resistance Dissemination in the Environment

Antimicrobial resistance (AMR) is an emerging threat to public health worldwide. The importance of environmental reservoirs as a source of AMR emergence and transfer is well established. In the first phase of the study, a comparative genomic analysis of antimicrobial resistance genes (ARGs) and mobile genetic elements (MGEs) in the gut microbiome of broiler and household chickens (Gallus gallus domesticus) was performed to evaluate the role of small scale poultry slaughter houses in resistance dissemination. An array of 52 qPCR primers targeting the 16S rRNA gene, ARGs and MGEs was used in the experiment to analyse the abundance of selected genes. A total of 22 ARGs and 7 MGEs were detected in all samples. The detection frequency of specific gene classes and diversity of genes was found to be higher in broiler as compared to household chicken. Sul1 was the most abundant ARG with the highest percent relative abundance (2.4%). Total percent relative abundance of ARGs in broiler chicken was found to be significantly (p < 0.05) greater than household chicken. A significant linear correlation (r2=0.89) was found between relative abundances of int1 and total ARGs. The clustering and correlation of selective ARGs with MGEs has implied that small scale poultry slaughterhouses can be a potential source for the dissemination of ARGs to other non-resistant environmental and/or clinical bacteria. Expansion in whole genome sequencing and subsequent increase in antibiotic resistance targets have paved the way of high throughput qPCR (HT-qPCR) for analyzing hundreds ofARGs in a single run. In the second phase of the study, a meta-analysis of 51 selected studies is performed to evaluate the abundance trends of ARGs over the last 7 years. WaferGenTM SmartChip was found to be the most widely used HT-qPCR platform among others for evaluating ARGs. More than 1000 environmental samples (excluding biological replicates) from different parts of the world have been analysed on HT-qPCR until October, 2018. Calculated detection frequency and normalized ARGs abundance (ARGs/ 16S rRNA gene) reported in gut microbiome have shown a trend of low ARGs as compared to other environmental matrices. Disparities in the HT-qPCR data analysis which are causing difficulties to researchers in precise interpretation of results have been highlighted and a possible way forward for resolving them is also suggested.The importance of anaerobic digesters for mitigating the dissemination of antimicrobial resistance genes is well known. The effect of substrate shock on the resistome of anaerobic digester is never evaluated. In the third phase sludge samples from 20 years old lab-scale bioreactors were analyzed by HT-qPCR for evaluating the impact of glucose shock on the community resistome of the reactors categorized as LS and HS. An array of 96 primers targeting antimicrobial resistance genes (ARGs) and mobile genetic elements (MGEs) was used in the first experiment to analyze the abundance of genes before and after the glucose perturbation. The relative abundance of majority of the genes was increased in response to glucose perturbation. A second more expanded array consisting of 214 primers was also used to analyze the cooccurrence of the genes and to compare the overall resistome of the two reactor types. The resistome of the two reactor types was found to be significantly different from each other (P<0.01). Analysis of the co-occurrence network implied that anaerobic digesters can be a potent site for the acquisition of ARGs by pathogenic bacteria via horizontal gene transfer, further aggravating the already complex issue of AMR. A significant evidence has suggested that the knowledge and attitude trends among the community, pharmacists and physicians can play a critical role in managing the ever increasing threat of AMR. Thus in the final phase of the study, a cross-sectional survey was performed using three specific self-administered questionnaires for community members, pharmacists/ pharmacy owners and physicians on a randomly selected sample population of 473, 424 and 308 respectively. Bivariate and multivariate logistic regression and Pearson chi-square tests was performed during data analysis. A response rate of 81.2% (n=385), 37.7% (n=160) and 53.9% (n=166) was achieved for general community, pharmacists/ pharmacy owners and physicians respectively. More than half of the community participants (55.6%; n=214), 26.6% (n=4) qualified pharmacists and 86.2% (n=125) non-qualified pharmacy owners possess poor knowledge of AMR. Education level was found to be significantly influencing (p<0.05) the AMR knowledge of the community members. In 90.6% (n=145) of the pharmacies included in the survey, a qualified pharmacist was not present at the time of the operations. Our study will provide effective assessment and potential insights in designing tri-faceted interventions for rationalizing antibiotics consumption thus controlling the development and dissemination of AMR.