Hash Functions Based on Ramanujan Graphs. - Hyungrok Jo (CREST Crypto-Math Project, 2017)

Full Cryptanalysis of Hash Functions Based on Cubic Ramanujan Graphs. - Hyungrok Jo; Christophe Petit 001; Tsuyoshi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017)

LPS-type Ramanujan graphs. - Hyungrok Jo; Yoshinori Yamasaki (ISITA, 2018)

Revisiting the Algorithms for the Quaternion ℓ-Isogeny Path Problems. - Hyungrok Jo; Junji Shikata (MobiSec, 2023)

A Tightly Secure Identity-Based Signature Scheme from Isogenies. - Jiawei Chen; Hyungrok Jo; Shingo Sato; Junji Shikata (PQCrypto, 2023)

Bloomier Filters on 3-Hypergraphs. - Hyungrok Jo; Junji Shikata (WISA, 2023)

A security analysis on MQ-Sign. - Yasuhiko Ikematsu; Hyungrok Jo; Takanori Yasuda (IACR Cryptol. ePrint Arch., 2023)

A Tightly Secure Identity-based Signature Scheme from Isogenies. - Hyungrok Jo; Shingo Sato; Junji Shikata (IACR Cryptol. ePrint Arch., 2023)

Tightly Secure Identity-Based Signature from Cryptographic Group Actions. - Thanh Xuan Khuc; Willy Susilo; Dung Hoang Duong; Fuchun Guo; Hyungrok Jo; Tsuyoshi Takagi (ProvSec (1), 2024)