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. As such, I lead the Cryptanalysis Taskforce research team at NTU, publish papers, give talks, and also actively serve the community. My team and I have won several open competitions on cryptanalysis on various symmetric-key cryptography standards.
I am constantly looking for PhD candidates (refer to this page) and Postdoc Research Fellows on both symmetric-key cryptography and privacy-preserving technologies, feel free to contact me for more information.
Recent Services / Appointments
Team Lead, Cryptanalysis Taskforce (since 2014)
IACR Board of Directors (since 2020)
Asiacrypt Steering Committee (since 2017)
General Chair, Asiacrypt 2021
Invited Talks at Asiacrypt 2022, FSE 2019, Inscrypt 2014, etc.
Government Agencies / Organizations
International Standards Organization (ISO), SC 27/WG2, Representative for Singapore (since 2017)
Consultant for problems in areas of cryptography and cybersecurity
Secretary, Residents' Network, People's Association (since 2020)
Best Paper Awards: FSE 2018, ACISP 2022
NTU/SPMS Collaborative Research Award 2022 (Co-PI)
NTU/SPMS Young Researcher Award 2021
NTU Accelerating Creativity and Excellence Award 2020 (Co-PI)
Best Publication Awards by Temasek Labs@NTU 2015, 2016, 2017
Winner of The Keccak Crunchy Crypto Collision and Pre-image Contest, for several occasions in 2012~2019
[New] The application deadline of the August 2023 batch of Master of Science in Cyber Security program is 28th February 2023
[New] 2022/09: There are multiple open positions of (senior) postdoc research fellows and PhD students with full scholarship support, on the topic of 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/3107
To my potential PhD or Final Year Project students, refer to this page for information.
2022/12: Invited talk at Asiacrypt 2022 on "Evolution of Cryptanalysis: Security Updates on SHA-3 and AES Hashing"
2022/11: Joint with L. Song and H. Wang, the paper entitled "Key Structures: Improved Related-Key Boomerang Attack against the Full AES-256" won the Best Paper Award of ACISP 2022. The paper improves the attack with lowest time complexity from 2^99 to 2^91 with the access to more related keys.
2022/04: Lanuch of Master of Science in Cyber Security.
2022/03/24: humbled to receive SPMS Young Reseacher Award 2021.
2022/02/14: News release by NTU/SPMS on the organization of Asiacrypt 2021.
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 release by NTU/CoS, 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, AY21/22 S2, AY22/23 S1
Algorithms and Computing II: AY17/18 S2, AY18/19 S2
Email: guojian [at] ntu.edu.sg
Address: School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Tel: (+65) 6514 8399