About Me

I am currently a post-doctoral researcher in the Information Security Group at Royal Holloway University of London, working with Martin Albrecht. Previously I did my PhD at IRIF, Université de Paris under the supervision of Frédéric Magniez. Prior to that, I studied at École polytechnique, at Télécom ParisTech and at Parisian Master of Research in Computer Science (MPRI).

Contact: yixin.shen at rhul.ac.uk

Curriculum Vitæ

You can download my CV here.

Research Interests

I mainly study quantum algorithms in the context of cryptanalysis. I am particularly interested in problems related to lattice-based cryptography.

Publications

1. Improved Classical and Quantum Algorithms for the Shortest Vector Problem via Bounded Distance Decoding
   Divesh Aggarwal, Yanlin Chen, Rajendra Kumar, Yixin Shen
   Contributed talk at the 25th Conference on Quantum Information Processing (QIP 2022). [arXiv]

   A preliminary version of the paper appeared in 38th International Symposium on Theoretical Aspects of Computer Science (STACS 2021) [PDF]

   Invited to TOCS Special Issue for STACS 2021 (regretfully declined).

2. Fast Classical and Quantum Algorithms for Online k-server Problem on Trees
   Ruslan Kapralov, Kamil Khadiev, Joshua Mokut, Yixin Shen, Maxim Yagafarov
   22th Italian Conference on Theoretical Computer Science (ICTCS 2021) [arXiv]

3. Improved Classical and Quantum Algorithms for Subset-Sum
   Xavier Bonnetain, Rémi Bricout, André Schrottenloher, Yixin Shen
   26th International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT 2020)
   [PDF] [arXiv]

4. Quantum Query Complexity of Dyck Languages with Bounded Height
   Kamil Khadiev, Yixin Shen
   Preprint (2019). [arXiv]

   Merged with Quantum Lower Bounds for 2D-Grid and Dyck Language
   Andris Ambainis, Kaspars Balodis, Jānis Iraids, Krišjānis Prūsis, Juris Smotrovs [arXiv]

   Merged version: Quantum Lower and Upper Bounds for 2D-Grid and Dyck Language 45th International Symposium on Mathematical Foundations of Computer Science (MFCS 2020) [PDF]
   

5. Quantum lattice enumeration and tweaking discrete pruning
   Yoshinori Aono, Phong Nguyen, Yixin Shen
   24th International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT 2018)
   [PDF] [eprint]

Teaching Assistant

• Advanced Object-Oriented Programming, Licence 3, Fall 2019, Instructor: Aldric Degorre.
• Object-oriented Programming and User Interfaces, Licence 2, Fall 2017-2018, Instructor: Cristina Sirangelo.
• Introduction to Java Programming, Licence 1, Falls 2017-2018-2019, Instructors: Arnaud Sangnier.

Service

I am in charge of organizing the ENSL/CWI/RHUL Joint Online Cryptography seminars.

I have been a reviewer for: TQC 2019, ANTS 2020, SODA 2021, ICALP 2021, CRYPTO 2021, ASIACRYPT 2021, SAC 2021.