Areas of Interest

My primary interests are in security, combinatorics and cryptography. I have been working in the following areas:
  1. Cloud Security
  2. Bitcoins, cryptotocurrencies and blockchain technology
  3. Security and Privacy of Internet of Things
  4. Security related aspects in Sensor Networks: Key management, access control
  5. Combinatorics: Design theory
  6. Vehicular Networks
  7. Security and reliability in Smart Grids and Critical Infrastructure
  8. Social and Complex Network Analysis
I want to explore anything that I find interesting.

An interesting thing about research is that at every step you are challenging yourself, and that is thrilling. I would like to thank all my collaborators across five continents, who have made research an enriching experience for me.

The best part in being in academia is nurturing. I have also been lucky to supervise/mentor some enthusiastic students. As a supervisor/mentor, I help students explore new areas, decide/define research problems, work on those problems. I learn a great deal working with them. Mentoring goes beyond discussions on specific research problems and even beyond research.
I also enjoy collaborating with industry. I get to understand, appreciate and work on real and practical problems.

Students

Current Students/Post Doc

Alumni

Undergraduate Students at IIT Indore

Publications:

Most of the papers are available online. In case you do not find the one you are looking for, please send me an email.

Journals

  1. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    Pairwise and Triple Key Distribution in Wireless Sensor Networks with Applications.
    IEEE Transactions on Computers, Vol 62, No 11, pp. 2224-2237, 2013.

  2. Sushmita Ruj and Amiya Nayak.
    A Decentralized Security Framework for Data Aggregation and Access Control in Smart Grids.
    IEEE Transactions on Smart Grids, Vol 4, Issue 1, 2013.

  3. Sushmita Ruj, Milos Stojmenovic and Amiya Nayak.
    Decentralized Access Control with Anonymous Authentication for Securing Data in Clouds.
    IEEE Transactions of Parallel and Distributed Systems, Vol 25, No 2, pp. 384-394, 2014.

  4. Paul Stankovski, Sushmita Ruj, Martin Hell and Thomas Johansson.
    Improved Distinguishers for HC-128.
    Design, Codes and Cryptography, Volume 63, Number 2, pp 225-240,2012.

  5. Zhen Huang, Sushmita Ruj, Marcos A. Cavenaghi, Milos Stojmenovic, Amiya Nayak.
    A Social Network Approach to Trust Management in VANETs. Peer-to-Peer Networking and Applications, Springer. Accepted. (Extended version of PIMRC paper) .

  6. Srimanta Bhattacharya, Sushmita Ruj and Bimal Roy.
    Combinatorial Batch Codes: Lower Bound and Optimal Constructions.
    Advances in Mathematics of Communications (AMC), AIMS, Volume 6, Number 2, pp 165-174, 2012.

  7. Sushmita Ruj and Bimal Roy.
    Key Predistribution using Partially Balanced Designs in Wireless Sensor Networks.
    International Journal of High Performance Computing and Networking (IJHPCN), Volume 7, Number 1, 2011. Journal version of ISPA paper.

  8. Sushmita Ruj and Bimal Roy.
    Key Predistribution Using Combinatorial Designs for Grid-group Deployment Scheme in Wireless Sensor Networks.
    ACM Transaction on Sensor Networks, Volume 6, Number 1, 2009.

  9. Sushmita Ruj and Bimal Roy.
    Revisiting Key Predistribution using Transversal Designs for a Grid-based Deployment Scheme.
    International Journal of Distributed Sensor Networks. Volume 5, Number 6, pp 660-674, 2009.

  10. Sushmita Ruj and Bimal Roy.
    Key Distribution Schemes Using Combinatorial Designs To Identify All Traitors.
    Congressus Numerantium, Volume 193, pp 195-214, 2008.

  11. Sushmita Ruj, Subhamoy Maitra and Bimal Roy.
    Key Predistribution using Transversal Design on a Grid of Wireless Sensor Network.
    Ad Hoc & Sensor Wireless Networks. Volume 5, Number 3-4, pp 247-264, 2008.

Book Chapters

  1. Binanda Sengupta and Sushmita Ruj.
    Cloud Data Auditing using Proofs of Retrievability.
    Guide to Sucurity Assurance for Cloud Computing, Springer. (Book Chapter) In Press.

  2. Sushmita Ruj and Rajat Saxena.
    Securing Cloud Data.
    Cloud Computing with E-science Applications, CRC Press/Taylor & Francis.

  3. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    Key Predistribution in Wireless Sensor Networks when Sensors are within Communication Range.
    Theoretical Aspects of Distributed Computing in Sensor Networks, Springer-Verlag, 2011.

  4. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    Security in Multihop Wireless Sensor Networks.
    Distributed Sensor Networks. Chapman & Hall, CRC Computer & Information Science Series. To appear.

Referred Conferences


  1. Binanda Sengupta and Sushmita Ruj.
    Publicly Verifiable Secure Cloud Storage for Dynamic Data Using Secure Network Coding.
    ACM AsiaCCS, Xi'an, China, 2016 (accepted).

  2. Binanda Sengupta, Samiran Bag, Sushmita Ruj and Kouichi Sakurai.
    Retricoin: Bitcoin Based on Compact Proofs of Retrievability.
    ICDCN, Singapore, 2016 (accepted).

  3. Sourya Joyee De and Sushmita Ruj.
    Decentralized Access Control of Data in the Cloud with Fast Encryption and Outsourced Decryption
    IEEE Globecom, 2015, San Diego, USA. Accepted

  4. Sourya Joyee De and Sushmita Ruj.
    Decentralized Access Control of Data in the Cloud with Fast Encryption and Outsourced Decryption
    IEEE Globecom, 2015, San Diego, USA. Accepted.

  5. Arindam Pal and Sushmita Ruj.
    CITEX: A new citation index to measure the relative importance of authors and papers in scientific publications.
    IEEE ICC, 2015, London, UK.


  6. Arpan Sen, Shrestha Ghosh, Arinjoy Basak, Harsh Parsuram Puria and Sushmita Ruj.
    Achieving Data Survivability and Confidentiality in Unattended Wireless Sensor Networks.
    The 29th IEEE AINA'15, Gwangju, Korea.


  7. Sourya Joyee De, Sushmita Ruj and Asim K. Pal
    Should Silence be Heard? Fair Rational Secret Sharing with Silent and Non-Silent Players.
    International Conference on Cryptology and Network Security (CANS'14), Crete, Greece.

  8. Nihal Balani and Sushmita Ruj.
    Temporal Access Control with User Revocation for Cloud Data.
    IEEE Trustcom'14, Beijing, China. Accepted.

  9. Sushmita Ruj and Arindam Pal.
    Analyzing Cascading Failures in Smart Grids under Random and Targeted Attacks.
    IEEE AINA'14, Victoria, Canada.

  10. Sushmita Ruj.
    Attribute Based Access Control in Clouds: A Survey.
    IEEE SPCOM, Bangalore, India. (Invited paper)

  11. Rohit Verma and Sushmita Ruj.
    Security Services using Crowdsourcing.
    5th International Conference on Ambient Systems, Networks and Technologies (ANT-2014), Hasselt, Belgium.

  12. Rajat Saxena and Sushmita Ruj.
    Book chapter on "Securing Cloud Data" in Cloud Computing with E-science Applications, CRC Press/Taylor & Francis. In Press.

  13. Sushmita Ruj and Kouichi Sakurai.
    Secure and Privacy Preserving Hierarchical Wireless Sensor Networks using Hybrid Key Management Technique.
    IEEE Globecom'13, Atlanta, USA.

  14. Samiran Bag, Sushmita Ruj and Bimal Roy.
    Jamming Resistant Schemes for Wireless Communication : A Combinatorial Approach
    9th International Conference on Information Systems Security (ICISS 13), Kolkata, India.

  15. Antonio Prado, Sushmita Ruj and Amiya Nayak.
    Enhanced Privacy and Reliability for Secure Geocasting in VANET.
    IEEE ICC'13, Budapest, Hungary.

  16. Sasi Kiran V.L.Reddy, Sushmita Ruj and Amiya Nayak.
    Data Authentication Scheme for Unattended Wireless Sensor Networks against a Mobile Adversary.
    IEEE WCNC'13, China.

  17. Sushmita Ruj, Milos Stojmenovic and Amiya Nayak
    Privacy Preserving Access Control with Authentication for Securing Data in Clouds.
    The 12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, CCGrid, Canada, 2012.

  18. Sasi Kiran V.L.Reddy, Sushmita Ruj and Amiya Nayak.
    Distributed Data Survivability Schemes in Mobile Unattended Wireless Sensor Networks.
    IEEE Globecom'12, USA. Accepted.

  19. Sushmita Ruj, Amiya Nayak and Sagar Naik.
    Securing Home Networks Using Physically Unclonable Functions.
    The Fourth International Conference on Ubiquitous and Future Networks, ICUFN, IEEE Communications Society, Phuket, Thailand, 2012. Accepted.

  20. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    DACC: Distributed Access Control in Clouds.
    10th IEEE TrustCom, China, 2011.

  21. Sushmita Ruj, Marcos A. Cavenaghi, Zhen Huang, Amiya Nayak and Ivan Stojmenovic.
    On Data-centric Misbehavior Detection in VANETs.
    IEEE 74th Vehicular Technology Conference, VTC-Fall, San Francisco, USA, 2011.

  22. Zhen Huang, Sushmita Ruj, Marcos A. Cavenaghi, Amiya Nayak and Ivan Stojmenovic.
    Limitations of Trust Management Schemes in VANETs and Countermeasures.
    22nd IEEE PIMRC, Toronto, Canada, 2011. Best paper Award

  23. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    Enhanced Access Control Scheme for Vehicular Networks.
    10th ADHOC-NOW, Germany, LNCS 6811, pp 191-205, 2011.

  24. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    Distributed Fine-grained Access Control in Wireless Sensor Networks.
    25th IEEE IPDPS, Anchorage, USA, 2011.

  25. Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
    Fully Secure Pairwise and Triple Key Distribution in Wireless Sensor Networks using Combinatorial Designs.
    30th IEEE INFOCOM, Shanghai, China, 2011.

  26. Samiran Bag and Sushmita Ruj.
    Key Distribution in Wireless Sensor Networks using Finite Affine Plane.
    IEEE AINA Workshop FINA, Singapore, 2011.

  27. Sushmita Ruj, Jennifer Seberry and Bimal Roy.
    Key Predistribution using Block Designs.
    IEEE International Conference on Computational Science and Engineering, CSE ’09, Volume 2, Vancouver, Canada, 2009.

  28. Sushmita Ruj and Bimal Roy.
    Key Predistribution Schemes Using Codes in Wireless Sensor Networks.
    Inscrypt, Lecture Notes in Computer Science, Beijing, China, 2009.

  29. Sushmita Ruj and Bimal Roy.
    Key Establishment Algorithms for some Deterministic Key Predistribution Schemes.
    Proceedings of The Sixth Workshop on Security In Information Systems, WOSIS08, INSTICC Press, Barcelona, Spain, 2008.

  30. Sushmita Ruj and Bimal Roy.
    Key Predistribution using Partially Balanced Designs in Wireless Sensor Networks.
    The Fifth International Symposium on Parallel and Distributed Processing and Applications, ISPA, Lecture Notes in Computer Science, Niagara Falls, Canada, 2007. Best Paper Award.

  31. S. B. Rao and Sushmita Ruj.
    Almost Ramsey type theorems for directed graphs.
    The International Conference on Discrete Mathematics, ICDM, Ramanuja Mathematical Society, Bangalore, India, 2006.