I have grown to love secrecy. It seems to be the one thing that can make modern life mysterious or marvelous to us. The commonest thing is delightful if only one hides it. - Oscar Wilde, The Picture of Dorian Gray
Welcome to my homepage! The above two quotes are from my favorite books and reflect my research interests.
My primary interests are in applied cryptography, security, privacy, combinatorics, and social and complex network analysis.
I am currently working on security and privacy of clouds, mobile ad hoc networks, vehicular networks, social networks and smart grids.
I am interested in designing practical cryptographic protocols for Internet of Things and Cyber-Physical Systems. Blockchain and cryptocurrencies are now big on my agenda.
I joined ISI in May 2013, after a brief but very enjoyable stint as Assistant Professor at Indian Institute of Technology, Indore.
I am an Associate Professor since May 2018.
I completed my Ph. D. at Indian Statistical Institute, India in 2009. My advisor was Prof. Bimal Roy. My Ph. D. thesis is about applications of combinatorial designs to key predistribution. During my Ph. D., I spent the summers at University of Wollongong, Australia, INRIA Roquencourt, France and Microsoft Research Labs, India.
I was born and raised in Durgapur Steel City in India, went to Carmel School, Durgapur Steel township till grade 10 (1998) and then DAV Model School(2000).
I am very fond of fish/seafood, green-black-white tea and whenever I get the opportunity, I check out items in my long and ever-increasing want-to-do-list.
I am looking for motivated Ph. D. and Masters students to work with me on interesting problems. If you are already a student enrolled in ISI,
please feel free to drop by my office to know more about the research activities of our team. If you are not enrolled in ISI, please apply to the relevant programs.
There are also some Post Doc positions on blockchains, privacy and cloud security.
Invited Speaker at Indo-Russia Cryptology, Moscow Russia, October 15-17, 2014.
Program Co-Chair for Workshop on Secure Networking and Forensic Computing (SNFC) (SNFC) to be held in conjuction with IEEE ICC in Sydney, Australia, June 10-14, 2014.
Publicity Co-Chair for IEEE CloudNet, Luxembourg, October 8-10, 2014.
Program Co-Chair for The Second International Workshop on Networks Forensics, Security and Privacy NFSP-13 held in conjuction with IEEE ICDCS in Philadelphia, USA, July 8-12.
Subhra Mazumdar and Sushmita Ruj.
Design of Anonymous Endorsement System in Hyperledger Fabric.
IEEE Transactions on Emerging Topics in Computing. Accepted.
Mauro Conti, Ankit Gangwal and Sushmita Ruj.
On the Economic Significance of Ransomware Campaigns: A Bitcoin Transactions Perspective.
Computers & Security. Elsevier. Vol 79, pp 162-189, 2018. Link to our article on MIT Tech Review
Samiran Bag, Sushmita Ruj and Kouichi Sakurai.
Bitcoin Block Withholding Attack : Analysis and Mitigation.
IEEE Transactions on Information Forensics and Security. Vol 12, No 8, pp 1967-1978, 2017.
Laltu Sardar and Sushmita Ruj.
The Secure Link Prediction Problem.
Advances in Mathematics of Communications. Accepted.
Mauro Conti, Sandeep Kumar E, Chhagan Lal and
Sushmita Ruj.
A Survey on Security and Privacy Issues of Bitcoin.
IEEE Communications Surveys and Tutorials. Accepted.
Binanda Sengupta and Sushmita Ruj.
Efficient Proofs of Retrievability with Public Verifiability for Dynamic Cloud Storage.
IEEE Transactions on Cloud Computing. Accepted.
Sourya Joyee De and Sushmita Ruj.
Efficient Decentralized Attribute Based Access Control for Mobile Clouds.
IEEE Transactions on Cloud Computing. Accepted.
Shahzaib Tahir, Sushmita Ruj, Yogachandran Rahulamathavan, Muttukrishnan Rajarajan and Cornelius Glackin.
A New Secure and Lightweight Searchable Encryption Scheme over Encrypted Cloud Data.
IEEE Transactions on Emerging Topics in Computing. Accepted.
Shahzaib Tahir, Sushmita Ruj, Ali Sajjad and Muttukrishnan Rajarajan.
A Parallelized Disjunctive Query based Searchable Encryption Scheme for Big Data.
Future Generation Computer Systems. Elsevier. Accepted.
Shahzaib Tahir, Sushmita Ruj, Ali Sajjad, Liutauras Steponkus and Muttukrishnan Rajarajan.
Fuzzy Keywords enabled Ranked Searchable Encryption Scheme for a Public Cloud Environment.
Computer Communications. Elsevier. Accepted.
Sabyasachi Dutta, Avishek Adhikari and Sushmita Ruj.
Maximal Contrast Color Visual Secret
Sharing Schemes.
Design, Codes and Cryptography. Acepted, 2018.
Tanusree Chatterjee, Sushmita Ruj and Sipra DasBit.
Security Issues in Named Data Networks.
IEEE Computer, Vol 51, No 1, pp 66-75.
Sushmita Ruj, Milos Stojmenovic and Amiya Nayak.
Decentralized Access Control with Anonymous Authentication for Securing Data in Clouds.
IEEE Transactions on Parallel and Distributed Systems, Vol 25, No 2, pp. 384-394, 2014.
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.
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.
Conference
Laltu Sardar and Sushmita Ruj.
FSPVDsse: A Forward Secure Publicly Verifiable Dynamic SSE Scheme.
Provsec, Cairns, Australia, 2019.
Soumen Pachal and Sushmita Ruj.
Rational Mining of Bitcoin.
COMSNET, Bangalore, India, 2019.
Sushmita Ruj, Mohammad Shahriar Rahman, Anirban Basu and Shinsaku Kiyomoto.
BlockStore: A Secure Decentralized Storage Framework on Blockchain.
IEEE AINA, Poland, 2018.
Mayank Raikwar, Subhra Mazumdar, Sushmita Ruj, Sourav Sen Gupta, Anupam Chattopadhyay and Kwok-Yan Lam.
A Blockchain Framework for Insurance Processes.
IFIP NTMS Workshop on Blockchains and Smart Contracts, Paris, France, 2018. Link to our article on IEEE Innovation Spotlight
Sushmita Ruj, Mohammad Shahriar Rahman, Anirban Basu and Shinsaku Kiyomoto.
Keyword-Based Delegable Proofs of Storage.
ISPEC, Tokyo, Japan, 2018.
Sabyasachi Dutta, Nishant Nikam and Sushmita Ruj.
Secure Computation of Inner Product of Vectors with Distributed Entries & its Applications to SVM.
ISPEC, Tokyo, Japan, 2018.
Binanda Sengupta, Nishant Nikam, Sushmita Ruj, Srinivasan Narayanamurthy and Siddhartha Nandi.
An Efficient Secure Distributed Cloud Storage for Append-only Data.
IEEE Cloud, 2018.
Abhishek Singh, Binanda Sengupta and Sushmita Ruj.
Certificate Transparency with Enhancements and Short Proofs.
ACISP, Auckland, NZ, 2017.
Sarbani Ghose and Sushmita Ruj.
Secrecy Performance Analysis of Relay Selection in Adaptive DF Relaying Network with Active Adversary.
IEEE ANTS, India, 2017. WIE Best paper Award
Binanda Sengupta and Sushmita Ruj.
Publicly Verifiable Secure Cloud Storage for Dynamic Data Using Secure Network Coding.
ACM AsiaCCS, Xi'an, China, 2016.
Binanda Sengupta, Samiran Bag, Sushmita Ruj and Kouichi Sakurai.
Retricoin: Bitcoin Based on Compact Proofs of Retrievability.
ICDCN, Singapore, 2016.
Hiroaki Anada, Sushmita Ruj and Kouichi Sakurai.
Expressive Rating Scheme by Signatures with Predications on Ratees.
International Conference on Network and System Security (NSS'16), Taiwan, 2016.
Arindam Pal and Sushmita Ruj.
A Graph Analytics Framework for Ranking Authors, Papers and Venues.
ACM KDD Workshop Mining and Learning with Graphs, 2016.
Sourya Joyee De and Sushmita Ruj
Failure Tolerant Rational Secret Sharing.
IEEE AINA, Switzerland, 2016.
Sushmita Ruj and Arindam Pal
Preferential Attachment Model with Degree Bound and its Application to Key Predistribution in WSN.
IEEE AINA, Switzerland, 2016.
Samiran Bag, Sushmita Ruj and Kouichi Sakurai
On the Application of Clique Problem for Proof-of-Work in Cryptocurrencies.
Inscrypt, Beijing, China, 2015.
Binanda Sengupta and Sushmita Ruj.
Cloud Data Auditing using Proofs of Retrievability.
Guide to Sucurity Assurance for Cloud Computing, Springer. (Book Chapter).
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
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.
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. Accepted.
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.
Nihal Balani and Sushmita Ruj.
Temporal Access Control with User Revocation for Cloud Data.
IEEE Trustcom'14, Beijing, China. Accepted.
Sushmita Ruj and Arindam Pal.
Analyzing Cascading Failures in Smart Grids under Random and Targeted Attacks.
IEEE AINA'14, Victoria, Canada.
Rohit Verma and Sushmita Ruj.
Security Services using Crowdsourcing.
5th International Conference on Ambient Systems, Networks and Technologies (ANT-2014), Hasselt, Belgium.
Sushmita Ruj.
Attribute Based Access Control in Clouds: A Survey.
IEEE SPCOM, Bangalore, India. (Invited paper)
Rajat Saxena and Sushmita Ruj.
Book chapter on "Securing Cloud Data" in Cloud Computing with E-science Applications, CRC Press/Taylor & Francis. In Press.
Sushmita Ruj and Kouichi Sakurai.
Secure and Privacy Preserving Hierarchical Wireless Sensor Networks using Hybrid Key Management Technique.
IEEE Globecom'13, Atlanta, USA.
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.
Antonio Prado, Sushmita Ruj and Amiya Nayak.
Enhanced Privacy and Reliability for Secure Geocasting in VANET.
IEEE ICC'13, Budapest, Hungary.
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.
Zhen Huang, Cheng Wang, Sushmita Ruj, Amiya Nayak, Ivan Stojmenovic.
Modeling Cascading Failures in Smart Power Grid using Interdependent Complex Networks and Percolation
Theory.
The 8th IEEE Conference on Industrial Electronics and Applications, ICIEA-13,
Melbourne, Australia. Accepted.
Sasi Kiran V.L.Reddy, Sushmita Ruj and Amiya Nayak.
Distributed Data Survivability Schemes in Mobile
Unattended Wireless Sensor Networks.
IEEE Globecom'12, USA.
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.
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.
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.
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.
Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
DACC: Distributed Access Control in Clouds.
10th IEEE TrustCom, China, 2011.
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.
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
Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
Enhanced Access Control Scheme for Vehicular Networks.
10th ADHOC-NOW, Germany, LNCS 6811, pp 191-205, 2011.
Sushmita Ruj, Amiya Nayak and Ivan Stojmenovic.
Distributed Fine-grained Access Control in Wireless Sensor Networks.
25th IEEE IPDPS, Anchorage, USA, 2011.
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.
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. (Book Chapter)
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. (Book Chapter)
