Sokjoon Lee

Dr. Sokjoon Lee

ETRI
orcid

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 February 2013 in Information Sciences
Verified
Journal Article
Closed access
JHJung Yeon Hwang
Jung Yeon Hwang
Sokjoon LeeSokjoon Lee
Sokjoon Lee
BCByung-Ho Chung
Byung-Ho Chung
HCHyun Sook Cho
Hyun Sook Cho
DNDaeHun Nyang
DaeHun Nyang

8 April 2023 in Sensors
Verified
Journal Article
Open access
PDF file
TKTaimoor Khan
Taimoor Khan
Gyuho ChoiGyuho Choi
Gyuho Choi
Sokjoon LeeSokjoon Lee
Sokjoon Lee
Driver distraction is considered a main cause of road accidents, every year, thousands of people obtain serious injuries, and most of them lose their lives. In addition, a continuous increase can be found in road accidents due to driver’s distractions, such as talking, drinking, and using electronic devices, among others. Similarly, several researchers have developed different traditional deep learning techniques for the efficient detection of driver activity. However, the current studies need further improvement due to the higher number of false predictions in real time. To cope with these issues, it is significant to develop an effective technique which detects driver’s behavior in real time to prevent human lives and their property from being damaged. In this work, we develop a convolutional neural network (CNN)-based technique with the integration of a channel attention (CA) mechanism for efficient and effective detection of driver behavior. Moreover, we compared the proposed model with solo and integration flavors of various backbone models and CA such as VGG16, VGG16+CA, ResNet50, ResNet50+CA, Xception, Xception+CA, InceptionV3, InceptionV3+CA, and EfficientNetB0. Additionally, the proposed model obtained optimal performance in terms of evaluation metrics, for instance, accuracy, precision, recall, and F1-score using two well-known datasets such as AUC Distracted Driver (AUCD2) and State Farm Distracted Driver Detection (SFD3). The proposed model achieved 99.58% result in terms of accuracy using SFD3 while 98.97% accuracy on AUCD2 datasets.

1 March 2011
Verified
Conference Paper
Closed access
JHJung Yeon Hwang
Jung Yeon Hwang
Sokjoon LeeSokjoon Lee
Sokjoon Lee
BCByung-Ho Chung
Byung-Ho Chung
HCHyun Sook Cho
Hyun Sook Cho
DNDaeHun Nyang
DaeHun Nyang
In this paper, we present a short group signature scheme for dynamic membership with controllable link ability. The controllable link ability enables an entity who possesses a special linking key to check if two signatures are from the same signer while preserving anonymity. It can be used for various anonymity-based applications that require necessarily the link ability such as vehicular adhoc network, and privacy-preserving data mining. Our scheme is sufficiently efficient and so, well-suited for real-time applications even with restricted resources, such as vehicular adhoc network and Trusted Platform Module. We prove that it achieves anonymity, trace ability, and non-frame ability. Our scheme supporting controllable link ability yields a signature that is shorter than the best-known normal group signature by one group element. Furthermore, we show by experiment that our scheme is comparable to the group signature scheme in terms of the amount of computation for basic operations such as signing, verification, and the key update caused by revocation. Using the link ability for dynamic membership, computation overhead in opening signer's identity can be significantly reduced.

Verified
Journal Article
Open access
PDF file
SLSaebom Lee
Saebom Lee
Sokjoon LeeSokjoon Lee
Sokjoon Lee
Crop diseases significantly threaten agricultural productivity, leading to unstable food supply and economic losses. The current approaches to automated crop disease recognition face challenges such as limited datasets, restricted coverage of disease types, and inefficient feature extraction, which hinder their generalization across diverse crops and disease patterns. To address these challenges, we propose an efficient data augmentation method to enhance the performance of deep learning models for crop disease recognition. By constructing a new large-scale dataset comprising 24 different classes, including both fruit and leaf samples, we intend to handle a variety of disease patterns and improve model generalization capabilities. Geometric transformations and color space augmentation techniques are applied to validate the efficiency of deep learning models, specifically convolution and transformer models, in recognizing multiple crop diseases. The experimental results show that these augmentation techniques improve classification accuracy, achieving F1 scores exceeding 98%. Feature map analysis further confirms that the models effectively capture key disease characteristics. This study underscores the importance of data augmentation in developing automated, energy-efficient, and environmentally sustainable crop disease detection solutions, contributing to more sustainable agricultural practices.

8 April 2024 in ACM SIGAPP Applied Computing Review
Verified
Conference Paper
Open access
BBBiagio Boi
Biagio Boi
CEChristian Esposito
Christian Esposito
Sokjoon LeeSokjoon Lee
Sokjoon Lee

9 April 2019 in ACM Transactions on Embedded Computing Systems
Verified
Journal Article
Open access
PDF file
LZLu Zhou
Lu Zhou
CSChunhua Su
Chunhua Su
ZHZhi Hu
Zhi Hu
Sokjoon LeeSokjoon Lee
Sokjoon Lee
HSHwajeong Seo
Hwajeong Seo
Elliptic Curve Cryptography (ECC) now is one of the most important approach to instantiate asymmetric encryption and signature schemes, which has been extensively exploited to protect the security of cyber-physical systems. With the advent of the Internet of Things (IoT), a great deal of constrained devices may require software implementations of ECC operations. Under this circumstances, the SM2, a set of public key cryptographic algorithms based on elliptic curves published by Chinese Commercial Cryptography Administration Office, was standardized at ISO in 2017 to enhance the cyber-security. However, few research works on the implementation of SM2 for constrained devices have been conducted. In this work, we fill this gap and propose our efficient, secure, and compact implementation of scalar multiplication on a 256-bit elliptic curve recommended by the SM2, as well as a comparison implementation of scalar multiplication on the same bit-length elliptic curve recommended by NIST. We re-design some existent techniques to fit the low-end IoT platform, namely 8-bit AVR processors, and our implementations evaluated on the desired platform show that the SM2 algorithms have competitive efficiency and security with NIST, which would work well to secure the IoT world.