Gangopadhyay Sugata
Areas of Interest
- Cryptology, Cryptographic Boolean functions; Quantum Computing and Cryptography, Stream Cipher Cryptanalysis.
Professional Background
From | Period | Position | Organisation |
---|---|---|---|
2020-08-31 | Ongoing | Professor | IIT Roorkee |
2012-01-01 | Ongoing | Associate Professor | IIT Roorkee |
2012-01-01 | Associate Professor | Indian Statistical Institute | |
2004-01-01 | 8 years | Assistant Professor | IIT Roorkee |
2004-01-01 | Assistant Professor | IIT Kharagpur | |
1999-01-01 | 4 years | Lecturer | BITS Pilani |
1997-01-01 | 1 year | Visiting Fellow | HRI Allahabad |
Multiple Posts
From | Period | Position | Organisation |
---|---|---|---|
2015-01-01 | 1 year | OC Examination CSE | IIT Roorkee |
2016-01-01 | 2 years | OC Administration. CSE | IIT Roorkee |
2017-01-01 | Ongoing | OC Maintenance. CSE. | IIT Roorkee |
2017-01-01 | 1 year | DAPC Chairman. CSE. | IIT Roorkee |
Honors and Awards
Award | Institute | Year |
---|---|---|
Visiting Professorship (Erasmus+) | University of Primorska, Koper. Slovenia. | 2017 |
Outstanding Teacher Award | Indian Institute of Technology Roorkee | 2016 |
ONR-Global VSP award. | Naval Postgraduate School, Monterey, USA. | 2013 |
Institute Silver Medal | Indian Institute of Technology Kharagpur | 1993 |
Educational Details
Degree | Subject | University | Year |
---|---|---|---|
Ph.D. | Mathematics | Indian Institute of Technology Kharagpur | 1998 |
M.Sc. | Mathematics | Indian Institute of Technology Kharagpur | 1993 |
Sponsored Research Projects
Topic | Funding Agency | Start Date | Period |
---|---|---|---|
Unified approach for Cryptographic Boolean Functions (Inida-Belarus Collaborative Project) | DST | 2017-01 | Ongoing |
Lightweight Encryption Techniques for Cyber Security Applications(India-Japan Collaborative Project) | DST - JSPS | 2016-01 | Ongoing |
Crypto. Significant Boolean Func. with Appl. in Stream and Block Ciphers (Indo-Slovenian joint proj) | DST-MHE Slovenia | 2011-01 | 9 years 7 months |
Security evaluation and design of crypto primitives for RFID and Sensor Networks (India-Japan) | DST-JST | 2009-01 | 11 years 7 months |
Noncommutative and Nonassociative Structures in Information Theory (India-Russia joint project) | DST-RFBR | 2015-01 | Ongoing |
Information Security Education and Awareness (ISEA) Project phase II | DeitY | 2014-01 | Ongoing |
Visits to outside institutions
Institute Visited | Purpose of Visit | Date |
---|---|---|
University of York, UK | Collaborative research | 2015-01-01 |
INRIA Paris | Invited Professor | 2020-08-31 |
INRIA Paris | Invited Professor | 2020-08-31 |
Naval Postgraduate School, Monterey, California, USA. | Visiting Professor | 2020-08-31 |
Naval Postgraduate School, Monterey, California, USA. | Visiting Professor | 2020-08-31 |
National Institute of Advanced Science and Technology, Tsukuba, Japan | Project work | 2013-01-01 |
University of Primorska, Slovenia | Project work | 2012-01-01 |
Nanyang Technological University, Singapore | Research collaboration | 2012-01-01 |
University of Primorska, Slovenia | Project work | 2020-08-31 |
National Institute of Advanced Industrial Science and Technology, Tokyo, Japan | Project work | 2020-08-31 |
National Institute of Advanced Industrial Science and Technology, Tokyo, Japan | Project work | 2011-01-01 |
National Institute of Advanced Industrial Science and Techlogy, Tokyo, Japan | Project work | 2020-08-31 |
University of Lund, Sweden | Research collaboration | 2003-01-01 |
Indian Statistical Institute Kolkata | Visiting Scientist | 2003-01-01 |
Courses or Conferences Organised
Conference Name | Sponsored By | Date |
---|---|---|
India-Japan Workshop on Cryptographic Techniques for Cyber Security | Partly by DST-JSPS Project | 2020-08 |
Referred Journal Papers
- A quantum algorithm to estimate the Gowers U_2 norm and linearity testing of Boolean functions, Jothishwaran C. A., Tkachenko A., Gangopadhyay S., Riera C., and Stanica P., Springer, 2020 , Quantum Information Processing , 19(9) vols
Particulars of course
- Developed NPTEL course entitled Discrete Mathematics. - Developed a four week lecture course entitled “Introduction to Cryptology” for NPTEL under the Massive Online Open Course (MOOC) program. (2016, total enrollment over 6000)Refereed Journal Papers
- Maitra S, Sinha S, Siddhanti A, Anand R and Gangopadhyay S, A TMDTO attack against Lizard. IEEE Transactions on Computers (accepted).
- Mandal B., Singh B., Gangopadhyay S., Maitra S and Vetrivel V., On Non-existence of Bent-negabent Rotation Symmetric Boolean Functions, Discrete Applied Mathematics (accepted).
- Gangopadhyay S., Paul G., Sinha S. and Stanica P., Generalized Nonlinearity of S-boxes, Advances in Mathematics of Communications. (accepted)
- Mandal, B., Gangopadhyay, S. and Stanica, P., Gowers U_3 norm of some classes of Boolean functions, Des. Codes Cryptogr. DOI10.1007/s10623-017-383-z.
- Mandal, B., Gangopadhyay, S. and Stanica, P., Cubic Maiorana-McFarland bent functions with no affine derivatives, International Journal of Computer Mathematics: Computer Systems Theory, 2(1) 14-27. DOI 10.1080/23799927.2017.1304453.
- Gangopadhyay, S., Pasalic, E., Stanica, P. and Datta, A note on non-splitting -bent functions, Information Processing Letters 121(2017) 1 - 5.
- Pasalic, E., Muratovic-Ribic, A., Hodzic, S. and Gangopadhyay, S., On derivatives of polynomials over finite fields through integration, Discrete Applied Mathematics, 217(2017) 294 - 303.
- Gangopadhyay, S., Kar Gangopadhyay, A.,Pollatos, S. and Stanica, P., Cryptographic Boolean functions with biased inputs, Cryptography and Communications – Discrete Structures, Boolean functions and Sequences 9(2): 301-314(2017)
- Gangopadhyay, S., Singh, B. and Vetrivel, V., Investigations on cubic rotation symmetric bent functions, Electronic Notes in Discrete Mathematics 56(2016) 15 - 19.
- Mandal, B., Stanica, P., Gangopadhyay, S., Pasalic, E., An Analysis of Class of Bent Functions, Fundamenta Informaticae, 146(3) (2016) 271 - 292.
- Gangopadhyay, S., and Mandal, B., Second-Order Nonlinearity Bounds of Cubic MMF Bent-Negabent Functions Constructed by Using Feistel Functions, in special issue for “Cryptology and Cyber-Security”, the IPSI BgD Transactions on Advanced Research, vol. 11, no. 1, 13 – 19 (2015).
- Gangopadhyay, S., and Sharma, D., A Note on the Structure of 6-Variable Bent Functions, inspecial issue for “Cryptology and Cyber-Security”, the IPSI BgDTransactions on Advanced Researchvol. 11, no. 1, 20 – 24 (2015)
- Bajric, S., Pasalic, E., Ribic-Muratovic, A. and Gangopadhyay, S., On generalized bent functions with Dillon’s exponents, Information Proc. Letters, 114: 222 – 227 (2014).
- Artamonov, V. A., Chakrabarti, S. Gangopadhyay, S and Pal, S. K., On Latin squares of polynomially complete quasigroups generated by shifts, Quasigroups and related systems 21: 117 – 130 (2013).
- Gangopadhyay, S., Pasalic, E. and Stanica, P., A note on generalized bent criteria for Boolean functions, IEEE Trans. Inform. Theory 59(5):3233 – 3236 (2013).
- Gangopadhyay, S., Affine inequivalence of cubic Maiorana--McFarland type bent functions, Discrete Applied Mathematics 161(7-8): 1141–1146 (2013).
- Gangopadhyay S., Joshi A., Leander G. and Sharma R. K., A new construction of bent functions based on -bent functions, Des. Codes Cryptogr. 66(1-3): 243 – 256 (2013).
- Stanica P, Martinsen T., Gangopadhyay S. and Singh B. K.,Bent and generalized bent Boolean functions,Des. Codes Cryptogr. 69(1):77 – 94(2013).
- Mihaljevic M., Gangopadhyay S., Paul G. and Imai H.,Internal State Recovery of Keystream Generator LILI-128 Based on aNovel Weakness of the Employed Boolean Function Information Processing Letters, 112(21):805 – 810 (2012).
- Mihaljevic M., Gangopadhyay S., Paul G. and Imai H., Generic Cryptographic Weakness ofk-normal Boolean Functions in Certain Stream Ciphersand Cryptanalysis of Grain-128, Periodica Mathematica Hungarica 65(2):39 – 61 (2012).
- Stanica P., Gangopadhyay S., Chaturvedi A., Kar Gangopadhyay A. and MaitraS., Investigations on bent and negabent functions via the nega-Hadamard transform, IEEE Trans. Inform. Theory 58(6):4064 – 4072 (2012).
- Gangopadhyay S. and Singh B. K.,On second-order nonlinearities of some type bent functions, Fundamenta Informaticae 114(3 – 4):271 – 285 (2012).
- Mihaljevic M., Gangopadhyay S., Paul G. and Imai H., Internal State Recovery of Grain-v1 Employing Normality Order of the Filter Function, IET Information Security 6(2): 55 – 64 (2012).
- Garg M. and Gangopadhyay S., A lower bound of the second-order nonlinearities of Boolean bent functions, Fundamenta Informaticae 111(4): 413 – 422 (2011).
- Gode R. and Gangopadhyay S., On lower bounds of second-order nonlinearities of cubic bent functions constructed by concatenating Gold functions, International Journal of Computer Mathematics 88(15):3125 – 3135 (2011).
- Canright D., Gangopadhyay S., Maitra S. and Stanica P., Laced Boolean functions and subset sum problem in finite fields, Discrete Applied Mathematics 159 (11): 1059 – 1188 (2011).
- Gode R. and Gangopadhyay S., Third-order nonlinearities of a subclass of Kasami functions, Cryptography and Communications - Discrete Structures, Boolean Functions and Sequences2: 69 – 83 (2010).
- Gode R. and Gangopadhyay S., On higher-order nonlinearities of monomial partial spreads type Boolean functions, Journal of Combinatorics, Information and System Sciences 35(3 – 4): 341 – 360 (2010).
- Gangopadhyay S., Sarkar S. and Telang R., On the lower bounds of second order nonlinearities of some Boolean functions, Information Sciences 180: 266--273 (2010).
- Gangopadhyay S., Sharma D., Sarkar S., MaitraS.,On Affine (Non) Equivalence of Bent Functions, Computing85: 37 – 55 (2009).
- Maitra S., Subba Rao Y. V., Stanica P., GangopadhyayS., Non trivial solutions to cubic seive congruence problems: x^3 = y^2 mod p, Special Issue on Applied Cryptography \& Data Security, Journal of “Computacion y Sistemas”, 12(3): 253 – 266 (2009).
- Gangopadhyay S., Sharma D.,On construction of non-normal Boolean functions,Australasian journal of combinatorics38: 267 – 272 (2007).
- Gangopadhyay S., Keskar P. H., MaitraS.,Patterson - Wiedemann construction revisited, Discrete MathematicsVol. 306, Issue 14, pp. 1540 – 1556, 2006.
- Sharma R. K., GangopadhyayS.,On congruence subgroups and units in ZS_4 ,Communications in Algebra 32(2): 663 – 668 (2004).
- Gangopadhyay S., A note on character sums with polynomial arguments,Finite Fields and Their Applications 9(4): 449 – 457 (2003).
- Sharma R. K., Gangopadhyay S., On Units in ZD_4, Pan American MathematicalJournal 2(1): 1 – 9 (2001).
- Sharma R. K., Gangopadhyay S., On Chains in Units of ZA_4 , Mathematical Sciences Research Hotline 4(9): 1 – 33 (2000).
- Sharma R. K., Gangopadhyay S., On Units in ZA_4, Mathematical Sciences Research Hotline 4(8): 13 – 29 (2000).
- Sharma R. K., Gangopadhyay S., V. Vetrivel, On Units in ZS_3 Communications in Algebra 25(7): 2285 – 2299 (1997).