Technical Reports: Recent submissions

  • Maginot lines and tourniquets : on the defendability of national cyberspace 
    Gosain, Devashish; Rawat, Madhur; Sharma, Piyush Kumar; Acharya, Hrishikesh Bhatt (IIIT-Delhi, 2020-01)
    National governments know the Internet as both a blessing and a headache. On the one hand, it unlocks great economic and strategic opportunity. On the other hand, government, military, or emergency-services become vulnerable ...
  • The road not taken : re-thinking the feasibility of voice calling over tor 
    Sharma, Piyush Kumar; Chaudhary, Shashwat; Hassija, Nikhil; Maity, Mukulika; Chakravarty, Sambuddho (IIIT-Delhi, 2019)
    Anonymous VoIP calls over the Internet holds great significance for privacy-conscious users, whistle-blowers and political activists alike. Prior research deems popular anonymization systems like Tor unsuitable for providing ...
  • Detecting activities at metro stations using smartphone sensors 
    Mongia, Aanchal; Gunturi, Venkata M. Viswanath; Naik, Vinayak (IIIT-Delhi, 2017-11-29)
    Our paper aims to build a classification-model which delineates the typical motion-related activities performed at a metro station using smart phone sensors. We focus on typical movements, such as climbing the stairs or ...
  • Qi points : placing decoy routers in the internet 
    Gosain, Devashish; Agarwal, Anshika; Acharya, Hrishikesh Bhatt; Chakravarty, Sambuddho (2016-09-23)
    Decoy Routing, the use of routers (rather than end hosts) as proxies, is a new direction in anti-censorship research. However, existing proposals require control of hundreds of Autonomous Systems (AS) to provide Decoy ...
  • Cairn : identifying network locations for large scale censorship by resource-constrained adversaries 
    Agarwal, Anshika; Gosain, Devashish; Acharya, Hrishikesh Bhatt; Chakravarty, Sambuddho (2016-09-23)
    Censorship of the Internet by government is a hotly contested topic. Some nations lean more toward free speech; others are much more conservative. How feasible is it for a government to censor the Internet? What mechanisms ...
  • Geographical bias in GitHub : perceptions and reality 
    Rastogi, Ayushi; Nagappan, Nachiappan; Gousios, Georgios (2016-01-11)
    Open source development has often been considered to be a level playing field for all developers. But there has been little work to investigate if bias plays any role in getting contributions accepted. The work presented ...
  • BluePark : tracking parking and un-parking events in indoor parking lot 
    Soubam, Sonia; Naik, Vinayak; Banerjee, Dipyaman; Chakraborty, Dipanjan (2015-10-26)
    Finding a parking spot in a busy indoor parking lot is a daunting task. Retracing a parked vehicle can be equally frustrating. We present BluePark, a collaborative sensing mechanism using smartphone sensors to solve these ...
  • Analyzing mutable checkpointing via invariants 
    Aggarwal, Deepanker; Kiehn, Astrid (2015-09-10)
    The well-known coordinated snapshot algorithm of mutable checkpointing [7{9] is studied. We equip it with a concise formal model and analyze its operational behavior via an invariant characterizing the snapshot computation. ...
  • Inference-based LLC-side access pattern estimation for shared cache modeling on commercial processors 
    Hemani, Rakhi; Banerjee, Subhasis; Guha, Apala (2015-05-19)
    Cache contention modeling is necessary for good resource utilization on commercial multicore processors. Our goal is to build cache contention models that are sensitive to changes in, 1) the micro-architecture, 2) ...
  • Biclique cryptanalysis of full round AES-128 based hashing modes 
    Chang, Donghoon; Ghosh, Mohona; Sanadhya, Somitra Kumar (2015-03-23)
    In this work, we revisit the security analysis of AES-128 instantiated hash modes. We use biclique cryptanalysis technique as our basis for the attack. The traditional biclique approach used for key recovery in AES (and ...
  • UP-Hist Tree : efficient data structure for high utility pattern mining from transaction databases 
    Goyal, Vikram; Dawar, Siddharth (2015-02-11)
    High-utility itemset mining is an emerging research area in the field of Data Mining. Several algorithms were proposed to find high- utility itemsets from transaction databases and use a data structure called UP-tree ...
  • Latent fingerprint matching 
    Sankaran, Anush; Vatsa, Mayank; Singh, Richa (2015-01-27)
    Latent fingerprint comparison evidences are used in the court of law for more than 100 years. Manual matching of latent fingerprints is challenged by subjectivity and inconsistency in terms of results and is not scalable ...
  • Biometric quality : from assessment to multibiometrics 
    Bharadwaj, Samarth; Vatsa, Mayank; Singh, Richa (2015-01-27)
    Quality is an attribute or a property of an item that quantitatively measures specific aspect or content. The definition and correct method of measurement of quality of a biometric modality that is usually represented by ...
  • Covariates of face recognition 
    Bhatt, Himanshu S; Singh, Richa; Vatsa, Mayank (2015-01-27)
    Face recognition has found several applications ranging from cross border security, surveillance, access control, multimedia to forensics. Face recognition under variations due to pose, illumination, and expression has ...
  • Towards practical infrastructure for decoy routing 
    Chakravarty, Sambuddho; Naik, Vinayak; Acharya, Hrishikesh Bhatt; Tanwar, Chaitanya Singh (2015-01-23)
    Network censorship and surveillance generally involves ISPs working under the orders of repressive regimes, monitoring (and sometimes filtering) users’ traffic, often using powerful networking devices, e.g. routers ...
  • Perception of data privacy in digital forensic investigation 
    Verma, Robin; Gupta, Gaurav (2014-12-25)
    The use of digital technology in conventional as well as new age crimes is increasing throughout the world, and researchers are working to develop digital forensics techniques to investigate such crimes. Digital forensic ...
  • An smartphone-based algorithm to measure and model quantity of sleep 
    Gautam, Alvika; Naik, Vinayak; Gupta, Archie; Sharma, SK (2014-09-17)
    Sleep quantity affects an individual’s personal health. The gold standard of measuring sleep and diagnosing sleep disorders is Polysomnography (PSG). Although PSG is accurate, it is expensive and it lacks portability. ...
  • ACCORD : an analytical cache contention model using reuse distances for modern multiprocessors 
    Hemani, Rakhi; Banerjee, Subhasis; Guha, Apala (2014-09-15)
    Simultaneous execution of multiple threads on multicores is necessary for good resource utilization. However, such utilization calls for accurate models to predict the impact on performance due to contention of shared ...
  • Consumer privacy and targeted pricing with stochastic valuations 
    Mishra, Shreemoy (2014-07-16)
    I study the market for consumer information. Firms cannot commit to privacy, so buyers anticipate disclosure of purchase history for targeted pricing. In the literature, strategic rejections of informative o ers make ...
  • Face anti-spoofing via motion magnification and multifeature videolet aggregation 
    Bharadwaj, Samarth; Dhamecha, Tejas I; Vatsa, Mayank; Singh, Richa (2014-06-03)
    For robust face biometrics, a reliable anti-spoofing approach has become an essential pre-requisite against attacks. While spoofing attacks are possible with any biometric modality, face spoofing attacks are relatively ...

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