Jian Guo

My name is Jian Guo, I am currently working with School of Physical and Mathematical Sciences, Nanyang Technological University in Singapore. My research interests focus on symmetric-key cryptography, especially cryptanalysis, design and implementation of (lightweight) hash functions, block ciphers, authenticated encryption schemes, and their applications such as message authentication codes.

Current Services:

PGP Public Key


  • [New] 2021/11: There are multiple open positions of postdoc research fellows on post-quantum cryptography inclusive of both symmetric-key and public-key: https://www.iacr.org/jobs/item/2793

  • [New] 2021/11: There are multiple open positions of (senior) postdoc research fellows, on symmetric-key cryptography including but not limited to quantum attacks , cryptanalysis of AES and SHA-3, FHE/MPC friendly designs, automatic tools or machine learning for cryptanalysis: https://www.iacr.org/jobs/item/2775

  • [New] 2021/04: There are several PhD and Master student positions supported by scholarships on the topic of privacy-preserving technologies and machine learning: https://www.ntu.edu.sg/scripts/news-events/scripts-research-scholarships

  • To my potential PhD or Final Year Project students, refer to this page for information.


2021/11/17: thanks to all for electing me to the IACR Board of Directors (Term 2022-2024), as promised I will do my best to promote research, education, and collaborations in the crypto community. References: the IACR 2021 Election and news release by NTU/SPMS.
2021/03: The first preimage attack against 8-round AES hashing: news, eprint
2019/03: Invited talk at FSE 2019 on "Security of SHA-3 and Related Constructions"
2018-02-08: Joint with C. Chaigneau, T. Fuhr, H. Gilbert, J. Guo, J. Jean, J. R. Reinhard, L. Song, the paper entitled "Key-Recovery Attacks on Full Kravatte" won the Best Paper Award of FSE 2018. The paper broke the full Kravatte (a PRF design based on the SHA-3 round function), and several subsequent patched versions.


01.2007 - 09.2010 Doctor of Mathematical Sciences School of Physical and Mathematical Sciences
PhD Supervisor:
Huaxiong Wang Nanyang Technological University, Singapore

08.2003 - 11.2006 Bachelor of Engineering School of Computer Engineering
(with First Class Honors) Nanyang Technological University, Singapore
FYP Supervisor:
Suiping Zhou


03.2013 - present Nanyang Technological University, Singapore
09.2010 - 02.2013 Institute for Infocomm Research, Singapore
01.2007 - 09.2010 Nanyang Technological University, Singapore


Discrete Mathematics: AY14/15 S2, AY15/16 S2, AY18/19 S1, AY19/20 S1, AY19/20 S2, AY20/21 S1, AY20/21 S2, AY21/22 S1
Algorithms and Computing II: AY17/18 S2, AY18/19 S2


Email: guojian@ntu.edu.sg
Address: Division of Mathematical Sciences, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Tel: (+65) 6514 8399