Delaram Kahrobaei

  • Professor (Adjunct)


Delaram Kahrobaei

Professor Delaram Kahrobaei is an American Mathematician and Computer Scientist, currently the University Dean for Research at the City University of New York (CUNY Central) since August 2021. She is also a tenured full Professor in the Computer Science and Mathematics Departments at Queens College (CUNY) and doctoral faculty in the PhD Program in Computer Science at CUNY Graduate Center.

Before going back to New York she was the Chair of Cyber Security in the Department of Computer Science at University of York (England) and the director of York Interdisciplinary Centre for Cyber Security. She was the only woman with such a title in the UK and one of the youngest Full Professors in the Computer Science Department at York.

Her research has been partially supported by grants from the US Office of Naval Research, Canadian New Frontiers in Research Fund Exploration, American Association of Advancement in Sciences, National Science Foundation, National Security Agency, UK-Netherlands: York Maastricht Partnership Investment Fund. She has over 85 publications in prestigious journals and conference proceedings and several US patents.

Her main research areas are Post-Quantum Algebraic Cryptography, Data Science, Applied Algebra.

Kahrobaei is one of the Associate Editors of the Advances of Mathematics of Communication, published by the American Institute of Mathematical Sciences. She is the Chief Editor of the International Journal of Computer Mathematics: Computer Systems Theory, Taylor & Francis. She is an Associate Editor of SIAM Journal on Applied Algebra and Geometry, The Society for Industrial and Applied Mathematics. 

Research Interests: Cyber Security, Post-quantum Cryptography, Fully Homomorphic Machine Learning, Data Science, Applied Algebra

CUNY Graduate Center, 2004

PhD, Mathematics

City College of New York, City University of New York, 2004

Master of Arts, Computer Science

Claremont Graduate University, 2004

Master of Science, Applied Mathematics

Sharif University of Technology, 1998

Bachelor of Science, Applied Mathematics and Computer Science

Liberal Studies Program, CUNY Graduate Center

Graduate Faculty, M.S. Program in Data Analysis and Visualization

From: September 2017 to present

CUNY Graduate Center

Graduate Faculty, M.S. Program in Data Science

From: September 2017 to present

City University of New York, Graduate Center

Full Professor, Doctoral Faculty, PhD Program in Computer Science

From: September 2006 to present

Institute Henri Poincare

Visiting Professor

January 2014
January – April, 2016
September 19 – October 2, 2017
November 14 –27, 2017
January 2018

From: January 2014 to February 2018

Sorbonne University, LIP6, Quantum Information lab, PolSys lab

Visiting Professor

November 21–28, 2016
January, 2017
March 9-17, 2017
Summer 2017

From: September 2016 to August 2017

Universitat Politecnica de Catalunya

Visiting Professor

From: June 2013 to December 2013

University of Toronto

Visiting Professor

From: June 2011 to August 2011

University of St Andrews

Assistant Professor in Pure Mathematics

From: August 2004 to September 2006

Universite de Geneve

Visiting Professor

January 2005/June 2005/January 2006

From: January 2005 to February 2006

IHES-Institute des Hautes Etudes Scientifiques

Visiting Professor

From: November 2004 to December 2004

Hunter College, CUNY


From: January 2000 to June 2004

Journal Articles


  1.  J. Gryak, D. Kahrobaei, C. Martinez-Perez, On the conjugacy problem in certain metabelian groups, Glasgow Mathematical Journal, , Cambridge University Press,, 1–20 (2018).
  2. J. Gryak, R. Haralick, D. Kahrobaei, Solving the Conjugacy Decision Problem via Machine Learning, Experimental Mathematics, Taylor & Francis, 1–13, 10.1080/10586458.2018.1434704 (2018).
  3. A. Gribov, D. Kahrobaei, V. Shpilrain, Practical Private-key Fully Homomorphic Encryption in Rings, Groups Complexity Cryptology, De Gruyter, (to appear), 1–14, (2018).
  4. I. Chatterji, D. Kahrobaei, N. Y. Lu, Cryptosystems Using Subgroup Distortion, Theoretical and Applied Infor- matics 29, 14–24 (2017).
  5. G. Di Crescenzo, D. Kahrobaei, M. Khodjaeva, V. Shpilrain, Practical and Secure Delegation of Exponentiations over Discrete-Log Groups to a Single Malicious Server, CCSW ’17 Proceedings of the 2017 on Cloud Computing Security Workshop, Association for Computing Machinery (ACM), 17–28 (2017).
  6. G. Di Crescenzo, D. Kahrobaei, M. Khodjaeva, V. Shpilrain, Computing Multiple Exponentiations: From Batch Verification to Batch Delegation, IEEE Conference on Communications and Network Security IEEE CNS 2017, the Third IEEE Workshop on Security and Privacy in the Cloud (SPC) 531–539 (2017).
  7. B. Cavallo, J. Delgado, D. Kahrobaei, E. Ventura, Algorithmic Recognition of Infinite-Cyclic-Extentions, Journal of Pure and Applied Algebra, Elsevier, 221 (2017) 2157–2179.
  8. S. Molaei, K. Horan, B. Nallamothu, D. Kahrobaei, M. Shiri, K. Najarian Deep Convolutional Neural Networks for Left Ventricle Segmentation, Conference proceeding, IEEE Engineering in Medicine and Biology Society conference (EMBC’17) 668–671 (2017).
  9. R. Flores, D. Kahrobaei, Cryptography with Right-angled Artin Groups, Theoretical and Applied Informatics 28 (2016), no. 3, pp. 8–16 DOI: 10.20904/283008
  10. J. Gryak, D. Kahrobaei, The Status of the Polycyclic Group-Based Cryptography: A Survey and Open Problems, Groups Complexity Cryptology, De Gruyter, Volume 8, Issue 2, 171–186 (2016).
  11. D. Kahrobaei, V. Shpilrain, Invited Paper: Using semidirect product of (semi)groups in public key cryptography, Computability in Europe 2016, Lecture Notes in Computer Science, Springer, LNCS 9709, Pursuit of the Universal, 132–141 (2016).
  12. D. Garber, D. Kahrobaei, H. T. Lam, Length Based attack for Polycyclic Groups, Journal of Mathematical Cryp- tology, De Gruyter, 33-44 (2015).
  13. B. Cavallo, G. Di Crescenzo, D. Kahrobaei, V. Shpilrain, Efficient and Secure Delegation of Group Exponentiation to a Single Server, RFIDsec 2015, Springer Lecture Notes Computer Science 9440 (2015), 156–173.
  14. D. Kahrobaei, C. Koupparis, and V. Shpilrain, A CCA secure cryptosystem using matrices over group rings, Contemporary Mathematics 633, American Mathematical Society, 73–80 (2015).
  15. B. Cavallo, D. Kahrobaei, Secret sharing using the Shortlex order and non-commutative groups, Contemporary Mathematics 633, American Mathematical Society, 1–8, (2015).
  16. B. Cavallo, D. Kahrobaei, A Polynomial Time Algorithm For The Conjugacy Decision and Search Problems in Free Abelian-by-Infinite Cyclic Groups, Reports@SCM 1, No. 1, Electronic Journal of the Societat Catalana de Matematiques, 55–61 (2014).
  17. D. Kahrobaei, H. T. Lam, Heisenberg groups as platform for the AAG key-exchange protocol, 2014 IEEE 22nd International Conference on Network Protocols (ICNP), IEEE, 660–664 (2014).
  18. M. Habeeb, D. Kahrobaei, C. Koupparis, and V. Shpilrain, Public key exchange using semidirect product of (semi)groups, in: ACNS 2013, Applied Cryptography and Network Security, Lecture Notes Comp. Sc. 7954 (2013), 475–486.
  19. A. Douglas, D. Kahrobaei, and J. Repka, A Classification of Embedding of Abelian Extensions of Dn into En+1, Journal of Pure and Applied Algebra, Elsevier, 217 (2013), 1942-1954.
  20. D. Kahrobaei, C. Koupparis, and V. Shpilrain, Public key exchange using matrices over group rings, Groups, Complexity, and Cryptology 5 (2013), 97–115.
  21. D. Kahrobaei, C. Koupparis, Non-commutative digital signatures using non-commutative groups, Groups, Com- plexity, Cryptology 4 (2012), 377–384.
  22. M. Habeeb, D. Kahrobaei, and V. Shpilrain, A Secret Sharing scheme based on group-presentation and word problem, Contemporary Mathematics, American Mathematical Society 582 (2012), 143–150.
  23. D. Kahrobaei, S. Majewicz, Residual Solvability of Generalized Free Products of Solvable Groups, Discrete Math- ematics and Theoretical Computer Science, France, 13, No 4 (2012), 45-50.
  24. D. Kahrobaei, On Residual Solvability of Generalized Free Products of Finitely Generated Nilpotent Groups, Communications in Algebra, Taylor and Francis Publication, 39 (2011), 647–656.
  25. K. Falconer, B. Fine, D. Kahrobaei, On Growth Rate of an Endomorphism of a Group Groups, Complexity, Cryptology, De Gruyter Publication, 3, Issue 2 (2011), 285–300.
  26. B. Fine, M. Habeeb, D. Kahrobaei, G. Rosenberger Aspects of non-abelian group-based cryptography: A survey and open problems, JP Journal of Algebra and Number Theory 21 (2011), 1–41.
  27. D.Kahrobaei, S. Sze, Finding n-root in nilpotent groups and applications in cryptography, IJAM, 1-20 (2011)
  28. K. Bencsath, A. Douglas, D. Kahrobaei, Some Residually Solvable One-relator Groups, Bulletin of the Irish Mathematical Society 65 (2010), 23–31.
  29. M. Habeeb, D. Kahrobaei, V. Shpilrain, A new Public Key Using Semi-Direct Products, Proceedings of the Second International Conference on Symbolic Computation and Cryptography, Royal Holloway University of London, (2010), 137–142.
  30. D. Kahrobaei, M. Anshel, Decision and Search in non-abelian Cramer Shoup, Groups, Complexity, Cryptology, De Gruyter Publication, 1 (2009), 217–225.
  31. D. Kahrobaei, Book Chapter: Doubles of Residually Solvable groups, Aspects of Infinite Group Theory, Algebra and Discrete Math, World Scientific Publication, 1 (2008), 192–200.
  32. G. Arzhantseva, P. de la Harpe, D. Kahrobaei, The True Prosoluble Completion of a Group: Examples and Open Problems, Geometriae Dedicata, Springer Netherlands, 124, No.1 (2007), 5–26. (Appendix by G. Arzhantseva, Z. Sunic).
  33. K. Bhutani, B. Khan, D. Kahrobaei, A Graphic Generalization of Arithmetic, Integers: Electronic Journal of Combinatorial Number Theory, 7, A12 (2007), 1–31.
  34. D. Kahrobaei, B. Khan, A Non-Commutative Generalization of the El Gamal Key Exchange using Polycyclic Groups, Proceeding of IEEE, GLOBECOM (2006), 1–5.
  35. D. Kahrobaei, A Simple Proof of a Theorem of Karrass and Solitar, Contemporary Mathematics, American Mathematical Society, 372 (2005), 107–108.
  36. D. Kahrobaei, Residual Solvability of Generalized free products, PhD Thesis, CUNY Graduate Center, (2004), 1–194.
  37. P. Brown, D. Kahrobaei, Metropolitan Mentors: Building a Network of Women in Mathematics and Computer Science across New York City, Book chapter in, Forward to Professorship in STEM: Inclusive Faculty Development Strategies that Work. Mavriplis, C. and Heller, R., eds. Elsevier Publishing. ISBN: 978-0-12-800855-3 (2015).
  38. J-C. Faugere, K. Horan, D. Kahrobaei, M. Kaplan, E. Kashefi, L. Perret, Fast Quantum algorithm for solving system of multivariate system of equations,, Submitted, 1–20 (2018)
  39. A. Gribov, J. Gryak, K. Horan, D. Kahrobaei, V. Shpilrain, R. Souroush, K. Najarian, Medical diagnostic based on encrypted medical data,, Submitted to BMC Medical Informatics and Decision Making, 1–12 (2018).
  40. A. Wood, V. Shpilrain, A. Mostashari, K. Najarian, D. Kahrobaei, Private Naive Bayes Classification of Personal Biomedical Data: Application in Cancer Data Analysis, Submitted, 1–8 (2018).
  41. R. Flores, D. Kahrobaei, T. Koberda, Algorithmic Problems in right-angled Artin groups: Complexity and Appli- cations,, 1–16, Submitted to Journal of Algebra (2018).
  42. D. Kahrobaei, K. Mallahi-Karai, Some applications of arithmetic groups in cryptography, Submitted, 1–13 (2018).
  43. G. Di Crescenzo, M. Khodjaeva, D. Kahrobaei, V. Shpilrain, Delegation computation to cloud, under submission.
  44. K. Horan, D. Kahrobaei, Hidden Subgroup Problem and Post-quantum Group-based Cryptography.
  45. J. Gryak, D. Kahrobaei, Cryptanalysis using Machine Learning.
  46. R. Flores, D. Kahrobaei, T. Koberda, Applications of Thurston norm in cryptography, under submission.



Authored/Edited Books



  1. D. Kahrobaei, B. Cavallo, D. Garber, Edited Book: Algebra and Computer Science, American Mathematical Society, Contemporary Mathematics, 677, ISBN-13 978-1-4704-2303-2 (2016).
  2. D. Kahrobaei, V. Shpilrain, Edited Book: Algorithmic Problems in Group Theory, Their Complexity and appli- cations in Information Security, American Mathematical Society, Contemporary Mathematics 633, ISBN 978-0– 8218–9859–8, (2015).
  3. B. Fine, D. Kahrobaei, and G. Rosenberger, Computational and Combinatorial Group Theory and Cryptography, American Mathematical Society, Contemporary Mathematics, 582, ISBN-10: 0-8218-7563-9, ISBN-13: 978-0- 8218-7563-6 (2012), 1–199.
  4. D. Kahrobaei, Edited Book: Groups, Complexity, Cryptology, De Gruyter Publication 3, Issue 1, ISSN 1869-6104 (May 2011).


General/Collaborative Research

B. August (CUNY), M. Anshel (City College of New York, CUNY), G. Arzhantseva (University of Vienna, Austria), K. Bencsath (Manhattan College), K. Bhutani(Catholic University of America), P. Brown (New York City College of Technology), B. Cavallo (Adherent Data Science Company in New York), I. Chatterji (University of Nice, France), P. de la Harpe (University of Geneva, Switzerland), J. Delgado (University of Catalunya), A. Douglas (New York City College of Technology and Graduate Center), G. Di Crescenzo (Applied Communication Sciences and New York University), B. Eick (Technische Universitat Braunschweig, Germany), K. Falconer (University of St Andrews, Scotland), J.-C. Faugere (LIP6, University of Sorbonne, Pierre et Marie Curie, France), B. Fine (Fairfield University), R. Flores (University of Seville, Spain), D. Garber (Holon University, Israel), J. Gryak (university of Michigan, Ann Arbor), V. Gitman (CUNY Graduate Center), M. Habeeb (California University in Pennsylvania), R. Haralick (CUNY Graduate Center), A. Gribov (CUNY, GC), K. Horan (CUNY, GC), M. Kaplan (LIP6, University of Sorbonne, Pierre et Marie Curie, France), B. Khan (University of Nebraska, Lincoln), E. Kashefi (Quantum Information Lab, LIP6, University of Pierre et Marie Curie, Paris, France and University of Edinburgh, Scotland), M. Khodjaeva (CUNY, GC), T. Koberda (University of Virginia), C. Koupparis (Royal Bank of Canada in New York), H.T. Lam (Oblong Security Company, LA), N. Y. Lu (CUNY GC), S. Majewicz (Kings Borough Community College, CUNY), K. Mallahi (Jacobs University of Bremen, Germany), C. Martinez-Perez (University of Zaragoza, Spain), N. Memarsadeghi (NASA), N. Memon (New York University), S. Molaye (Harvard University), A. Mostashari (LifeNome, Inc.), K. Najarian (University of Michigan, Ann Arbor), L. Perret (LIP6, University of Sorbonne, Pierre et Marie Curie, France), J. Repka (University of Toronto, Canada), G. Rosenberger (Hamburg University, Germany), D. Savchuk (University of South Florida, Tampa), V. Shpilrain (City College of New York), R. Soroushmehr (University of Michigan, Ann Arbor), Z. Sunic (Texas A&M University), S. Sze (CUNY Graduate Center), E. Ventura (University of Politecnica Catalunya).



  • September 2008 – current : Director and Founder, Center for Logic Algebra, Computation.
  • March 2015 – current : Advisory board, CUNY Hub for Innovation and Entrepreneurship.
  • April 2015 – current : Member of the Faculty Advisory Board Data Science @CUNY.
  • November 2012 – current : Co-Founder, President, Infoshield, Inc., NY,
  • September 2016 – current : Member of the board of advisory at LifeNome Inc. Security Advisor.


System and Method for Private-Key Fully Homomorphic Encryption an, (US20170063526)

Method and apparatus for secure delegation of computation, (U.S. 9,825,926)

Graphic Generalization of Arithmetic, (Principal Investigator)

Edinburgh Mathematical Society, 2006

Questions concerning True Prosoluble Completion of a groups and Residual Solvability, (Principal Investigator)

London Mathematical Society, 2005-2006

ADVANCE-IT START proposal, HRD- 0811192, (Co-Principal Investigator)

National Science Foundation, 2008-2011

Cryptography with Engel Groups, (Co-Principal Investigator)

Instituto Nazionale di Alta Matematica, Gruppo Nazionale per le Strutture Algebriche, Geometriche e le loro Applicazioni, 2018

International Research Conference for Women in Mathematics on Algebra, Logic, Theoretical Computer Science, (Principal Investigator)

National Science Foundation, 2008-2009

Educational NASA Computational and Scientific Case Studies (enCOMPASS), (Co-Principal Investigator)

National Aeronautics and Space Administration (NASA) /Goddard Space Flight Center, 2012

Building Cybersecurity Capacity, (Principal Investigator)

National Science Foundation, 2011-2013

Research in Cryptography, (Principal Investigator)

CUNY Research Foundation, 2007-2018

International Symposium of Symbolic and Algebraic Computation, ISSAC 2018, (Co-principal Investigator)

National Security Agency, 2018

A Fully Homomorphic Encryption Scheme with noise Using Rings, (Principal Investigator)

Institut Henri Poincare, IHP, Research in Paris Grant (RiP), 2018

Generic Complexity of Conjugacy Search Problem in Polycyclic Groups and Applications to Cryptography, (Principal Investigator)

American Association for the Advancement of Science, 2012-2013

New Approaches to Information Security Based on Group Theory , (Principal Investigator)

Office of Naval Research, 2012–2015

Practical Fully Homomorphic Encryption and Applications, (Principal Investigator)

Office of Naval Research, 2015-2018