Publications

2025

[J18] HyeonJun Yoo, Taewoong Kang, Naryun Woo, Jihyeon Ryu. (2025). "LAEC: Lightweight Authentication Protocol for Energy-Efficient and Cost-Effective Communication in Wireless Sensor Network Environments." IEEE Sensors Journal, 25(16), 31709 - 31725.

[D11] HyeonJun Yoo†, Somi Lim†, Jihyeon Ryu. (2025). "Malware Family Classification Using Static Analysis-Based CALL offset Features and Dynamic Class Weighting Loss Adjustment Technique." CISC-S 2025, Korea Institute of Information Security and Cryptology. (poster) (†: Authors contributed equally)

[D10] Seoyeon Choi†, Jinseob Kim†, Jihyeon Ryu. (2025). "Research Trends on Response to Zero-Day Attacks." CISC-S 2025, Korea Institute of Information Security and Cryptology. (poster) (†: Authors contributed equally)

[D9] Songhye Kim†, Eelhwan Song†, Jihyeon Ryu. (2025). "Security Threats in Federated Learning-Based AI Models." CISC-S 2025, Korea Institute of Information Security and Cryptology. (poster) (†: Authors contributed equally)

[D8] Naryun Woo†, Somi Lim†, Jihyeon Ryu. (2025). "A Federated Learning-Based Anomaly Detection Framework Using Logs and Packets in a Distributed SDP Environment." CISC-S 2025, Korea Institute of Information Security and Cryptology. (poster) (†: Authors contributed equally)

[J17] Hyang Jin Lee, Sangjin Kook, Keunok Kim, Jihyeon Ryu, Hakjun Lee, Youngsook Lee, Dongho Won. (2025). "Lightweight and Efficient Authentication and Key Distribution Scheme for Cloud-Assisted IoT for Telemedicine" Sensors, 25(9), 2984.

[P1] Jihyeon Ryu, Naryun Woo, Taewoong Kang. (2025). "Efficient and Secure Access Authentication System for User Equipment and Massive MTC Devices." Korean Patent, No. 10-2025-0040657, 28 March, 2025. (Application)

[J16] Naryun Woo, Taewoong Kang, Jihyeon Ryu. (2025). "CESA: Chebyshev-Polynomials-based Efficient and Secure Access Authentication Scheme for both User Equipment and Massive Machine-Type-Communication Devices over 5G Networks." IEEE Internet of Things Journal, 12(11), 17542 - 17557.

[J15] Jihyeon Ryu, Taeseok Kim. (2025). "Enhancing Hospital Data Security: A Blockchain-Based Protocol for Secure Information Sharing and Recovery." Electronics, 14(3), 580.

[J14] Hyang Jin Lee, Sangjin Kook, Keunok Kim, Jihyeon Ryu, Youngsook Lee, Dongho Won. (2025). "LAMT: Lightweight and Anonymous Authentication Scheme for Medical IoT Services." Sensors, 25(3), 821.

2024

[J13] Hakjun Lee, Jihyeon Ryu. (2024). "Physical-Unclonable-Function-based Secure and Anonymous User Authentication for Smart Homes." IEEE ACCESS, 12, 122483 - 122498.

[D7] Naryun Woo, Jihyeon Ryu. (2024). "Trends in Homomorphic Encryption Research." CISC-S 2024, Korea Institute of Information Security and Cryptology. (oral)

[D6] Somi Lim, HyeonJun Yoo, Seoyeon Choi, Jihyeon Ryu. (2024). "A Study on Anti-Analysis Technique Detection Using Graph Neural Network." CISC-S 2024, Korea Institute of Information Security and Cryptology. (oral)

[D5] Taewoong Kang, Jihyeon Ryu. (2024). "Study on the Application of Differential Privacy Based on Data Characteristics." CISC-S 2024, Korea Institute of Information Security and Cryptology. (poster)

[J12] Sangjin Kook, Keunok Kim, Jihyeon Ryu, Youngsook Lee, Dongho Won. (2024). "Lightweight Hash-Based Authentication Protocol for Smart Grids." Sensors, 24(10), 3085. 

[J11] Taewoong Kang, Naryun Woo, Jihyeon Ryu. (2024). "Enhanced Lightweight Medical Sensor Networks Authentication Scheme Based on Blockchain." IEEE ACCESS, 12, 35612 - 35629.

[J10] Hakjun Lee, Jihyeon Ryu, Dongho Won. (2024). "Secure and Anonymous Authentication Scheme for Mobile Edge Computing Environments." IEEE Internet of Things Journal, 11(4), 5798 - 5815.

2023

[D4] Hyungbeom Jang, Jihyeon Ryu. (2023). "A Study on Deep Neural Network for User Privacy Based on Split Learning and Homomorphic Encryption." CISC-W 2023, Korea Institute of Information Security and Cryptology. (poster)

[D3] Hyungbeom Jang, Jihyeon Ryu. (2023). "A Study of the Audio Data Split Learning Model to Protect User Privacy." ACK 2023, Korea Information Processing Society. (oral)

[J9] Keunok Kim, Jihyeon Ryu, Hakjun Lee, Youngsook Lee, Dongho Won. (2023). "Distributed and Federated Authentication Schemes Based on Updatable Smart Contracts." Electronics. 12(5), 1217. 

[J8] Keunok Kim, Jihyeon Ryu, Youngsook Lee, Dongho Won. (2023). "An Improved Lightweight User Authentication Scheme for the Internet of Medical Things." Sensors, 23(3), 1122. 

[C8] Jihyeon Ryu, Keunok Kim, Dongho Won.(2023). "A Study on Partially Homomorphic Encryption." IMCOM. 1 - 4. 

~ 2022

[J7] Jihyeon Ryu, Yifeng Zheng, Yansong Gao, Alsharif Abuadbba, Junyaup Kim, Dongho Won, Surya Nepal, Hyoungshick Kim, Cong Wang. (2022). "Can differential privacy practically protect collaborative deep learning inference for IoT?" Wireless Networks. 1 - 21. 

[J6] Fikadu Degefa, Jihyeon Ryu, Hyoungshick Kim, Dongho Won. (2022). "MES-FPMIPv6: MIH-Enabled and enhanced secure Fast Proxy Mobile IPv6 handover protocol for 5G networks." PLOS ONE. 

[J5] Jihyeon Ryu, Hakjun Lee, Youngsook Lee, Dongho Won. (2022). "SMASG: Secure Mobile Authentication Scheme for Global Mobility Network." IEEE ACCESS. 10, 26907 - 26919. 

[J4] Jihyeon Ryu, Dongwoo Kang, Dongho Won. (2022). "Improved Secure and Efficient Chebyshev Chaotic Map-Based User Authentication Scheme." IEEE ACCESS. 10, 15891 - 15910. 

[C7] Jihyeon Ryu, Dongho Won, Youngsook Lee. (2022). "A Study of Split Learning Model." IMCOM. 1 - 4. 

[D2] Jihyeon Ryu, Dongho Won. (2021). "A Survey of Signature System using Bilinear Pairing." ACK 2021, Korea Information Processing Society. 

[D1] Jihyeon Ryu, Dongho Won, Youngsook Lee (2021). "A Study of Split Learning Model to Protect Privacy." Convergence Security Journal. 21(3), 49 - 56. 

[C6] Hakjun Lee, Jihyeon Ryu, Youngsook Lee, Dongho Won. (2021). "Security Analysis of Blockchain-based User Authentication for Smart Grid Edge Computing Infrastructure." IMCOM. 1-4. 

[J3]  Jihyeon Ryu, Dongwoo Kang, Hakjun Lee, Hyoungshick Kim, Dongho Won. (2020). "A Secure and Lightweight Three-Factor-Based Authentication Scheme for Smart Healthcare Systems." Sensors. 20(24). 

[J2] Hakjun Lee, Dongwoo Kang, Jihyeon Ryu, Dongho Won, Hyoungshick Kim, Youngsook Lee. (2020). "A three-factor anonymous user authentication scheme for Internet of Things environments." Journal of Information Security and Applications. 52(6). 

[C5] Jihyeon Ryu, Hyoungshick Kim, Youngsook Lee, Dongho Won. (2020). "Cryptanalysis of Protocol for Heterogeneous Wireless Sensor Networks for the Internet of Things Environment." IMCOM 2020. 1 - 4. 

[C4] Sewan Ha, Jihyeon Ryu, Hyoungshick Kim, Dongho Won, Youngsook Lee. (2019). "Cryptanalysis of Kumar et al.’s Authentication Protocol for Wireless Sensor Networks." Information Science and Applications. 329 - 340. 

[C3] Jihyeon Ryu, Youngsook Lee, Dongho Won. (2019). "Cryptoanalysis of Lightweight and anonymous three-factor authentication and access control protocol for real-time applications in wireless sensor networks." ICCST 2019. 341 - 349. 

[J1] Jihyeon Ryu, Hakjun Lee, Hyoungshick Kim, Dongho Won. (2018). "Secure and efficient three-factor protocol for wireless sensor networks." Sensors. 18(12). 

[C2] Jihyeon Ryu, Taeui Song, Jongho Moon, Hyoungshick Kim, and Dongho Won. (2018). " Cryptanalysis of Improved and Provably Secure Three-Factor User Authentication Scheme for Wireless Sensor Networks." ICCST 2018. 49 - 58. 

[C1] Taeui Song, Dongwoo Kang, Jihyeon Ryu, Hyoungshick Kim, and Dongho Won. (2018). "Cryptanalysis and Improvement of an ECC-based Authentication Protocol for Wireless Sensor Networks." ICCSA 2018. 50 - 61.