c = A \cdot s + (0 \Vert PDMU❤️) where s is a random small-norm vector [BDLOP18].
My name is Khai Hanh Tang. I am currently a research fellow in Cryptography at Nanyang Technological University, Singapore (from December 2022 till now).
My PhD candidature was from January 2018 to July 2022 at Nanyang Technological University, Singapore, with the thesis title New and Improved Zero-Knowledge Argument Systems for Code-Based Cryptography (see DR-NTU), under the supervision of Prof. Huaxiong Wang, Prof. San Ling, and Dr. Khoa Nguyen.
My research interests include zero-knowledge proofs (zkSNARKs, code-based ZKP, …) and privacy-preserving signatures. Related links: ORCID ID, Scholar.
Countries I have ever been to are 🇻🇳 🇹🇭 🇵🇭 🇸🇬 🇲🇾 🇯🇵 🇮🇩 🇦🇺 🇫🇷 🇮🇹 🇻🇦 🇩🇪 🇧🇭 (transit) 🇦🇹.
On 20 March, my submission Sovereign Flexibly Accountable Functional Signatures was accepted at Cycle 2 of ACNS 2026 (New York, United States) ==> ACNS 2026 ✅
On 10 March 2026 (11 March in Singapore time), my submission A SNARK for (Non-)Subsequences with Text-Sub-Linear Proving Time was accepted at ESORICS 2026 (Rome, Italy). Unfortunately, another submission of mine was rejected. ==> ESORICS 2026 ✅❌
On 20 February 2026, I got an early rejection from CCS 2026 (First Review Cycle). ==> CCS 2026 ❌
On 17 December 2025, I got an early rejection from PKC 2026. ==> PKC 2026 ❌
On 10 December 2025, I got a rejection from CT-RSA 2026. ==> CT-RSA 2026 ❌
On 28 November 2025, I got a secret acceptance. ==> PDMU ✅
On 21 November 2025, I got a rejection from ACNS 2026 (Cycle 1). ==> ACNS 2026 ❌
On 4 October 2025, I lost the quarterfinal match in Mixed Doubles Series B and the third-place match in Men Doubles Series B at the Third Homies Badminton Tournament. ❌❌
On 26 September 2025, I got 1 rejection from CSF 2026 (Summer Cycle). ==> CSF 2026 ❌
On 13 August 2025, I got 2 rejections from Asiacrypt 2025. ==> Asiacrypt 2025 ❌❌
On 30 April 2025, I finished all the work with respect to Grant FY24-1414-A from Ethereum Support Program (report, PoC source code). Happy Vietnam’s Reunification Day 🇻🇳!
On 27 April 2025, I lost all matches at the badminton tournament PinoySG Ultramix 2025 (mixed doubles). ❌
On 8 April 2025, I got 2 early rejections from Crypto 2025. ==> Crypto 2025 ❌❌
On 29 March 2025, I got a rejection (rejected round 2) from CCS 2025 (First Review Cycle). Earlier, I also got a rejection (rejected round 1) from this conference’s cycle. ==> CCS 2025 ❌❌
On 17 March 2025, I got an acceptance, whose title is Everlasting Fully Dynamic Group Signatures, from Cycle 2 of ACNS 2025 (Munich, Germany). ==> ACNS 2025 ✅
In February 2025, I got 2 rejections from PKC 2025. ==> PKC 2025 ❌❌
In December 2024, I got a rejection from Eurocrypt 2025. ==> Eurocrypt 2025 ❌
In October 2024, I got 2 medals from 2 badminton tournaments (hosted by VCS and Homies badminton groups in Singapore): 1 silver medal 🥈 from VCS and 1 gold medal 🥇 (series B for mid-beginner players) from Homies.
On 26 August 2024, I got 2 rejections from Asiacrypt 2024. One of these 2 rejections is an early rejection, in July 2024. ==> Asiacrypt 2024 ❌❌
On 2 July 2024, my first SNARK paper titled Succinct Non-Subsequence Arguments was accepted at SCN 2024 (Amalfi, Italy). ==> SCN 2024 ✅
On 4 June 2024, my grant application End-to-End Publicly Verifiable Secure 2PC to The Ethereum Foundation’s Ecosystem Support Program (EF ESP) was approved and countersigned.
On 14 May 2024, my patent application, with Hubert Andre LE VAN GONG, Shanshan Hua, and Siew Hoon Lim from PayPal Inc., titled Threshold multi-party computation with must-have member was granted (Google Patents).
My post-doctoral research career, from the end of 2022 till 12 May 2024, failed and achieved as follows: Asiacrypt 2023 ❌, Eurocrypt 2024 ❌, PKC 2024 ❌✅ (Sydney, Australia), AsiaCCS 2024 ❌, and Crypto 2024 ❌❌.
11. Yingfei Yan, Khai Hanh Tang, Hien Chu, Sherman S. M. Chow, San Ling, Huaxiong Wang, and Kai Zhang. Sovereign Flexibly Accountable Functional Signatures. ACNS 2026. (to appear)
10. Dario Fiore, San Ling, Khai Hanh Tang, Hong Hanh Tran, Huaxiong Wang, and Yingfei Yan. A SNARK for (Non-)Subsequences with Text-Sub-Linear Proving Time. ESORICS 2026. (ePrint, proceedings version to appear)
9. San Ling, Chan Nam Ngo, Khai Hanh Tang, and Huaxiong Wang. Publicly Auditable Garbled Circuit. Archive. (ePrint, PoC source code)
8. Yimeng He, San Ling, Khai Hanh Tang, and Huaxiong Wang. Everlasting Fully Dynamic Group Signatures. In ACNS 2025. (ePrint, proceedings)
7. San Ling, Khai Hanh Tang, Khu Vu, Huaxiong Wang, and Yingfei Yan. Succinct Non-Subsequence Arguments. In SCN 2024. (ePrint, proceedings)
6. Hubert Andre LE VAN GONG, Khai Hanh Tang, Shanshan Hua, and Siew Hoon Lim. (Current Assignee: PayPal Inc) Threshold multi-party computation with must-have member. US Patent US11985254B2. (Google Patents)
5. Khai Hanh Tang, Minh Pham, and Chan Nam Ngo. RAMenPaSTA: Parallelizable Scalable Transparent Arguments of Knowledge for RAM Programs. Archive. (ePrint)
4. Hubert Andre LE VAN GONG, Khai Hanh Tang, and Shanshan Hua. (Current Assignee: PayPal Inc) Systems and methods for configuring a networked system to perform threshold multi-party computation. US Patent US11909866B2. (Google Patents)
3. San Ling, Khoa Nguyen, Duong Hieu Phan, Khai Hanh Tang, Huaxiong Wang, and Yanhong Xu. Fully Dynamic Attribute-Based Signatures for Circuits from Codes. In PKC 2024. (ePrint, proceedings)
2. San Ling, Khoa Nguyen, Duong Hieu Phan, Hanh Tang, and Huaxiong Wang. Zero-Knowledge Proofs for Committed Symmetric Boolean Functions. In PQCrypto 2021. (proceedings)
1. Khoa Nguyen, Hanh Tang, Huaxiong Wang, and Neng Zeng. New Code-Based Privacy-Preserving Cryptographic Constructions. In Asiacrypt 2019. (ePrint, proceedings)