• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.13 no.5
• /
• pp.113-127
• /
• 2003

WTLS as secure protocol of WAP makes TLS that is used in wireless Intemet protocol for TCP security be appropriate for wireless environments. And purpose of WTLS is to provide safe and efficient services. WTLS protocol consists of 4 protocols(Handshake, ChangeCipherSpec, Alert, Application Data etc.). In this papers we analyze properties of Handshake protocol and procedures of establishing master secret in detail. And then we analyze securities against several attacker models with them for a basis. Also we propose new Handshake protocol that is secure against active attacker model and can provide various security services.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.15 no.5
• /
• pp.1630-1648
• /
• 2021

Owing to the unprecedented COVID-19 pandemic, the pharmaceutical industry has attracted considerable attention, spurred by the widespread expectation of vaccine development. In this study, we collect relevant topics from news articles related to COVID-19 and explore their links with two South Korean pharmaceutical indices, the Drug and Medicine index of the Korea Composite Stock Price Index (KOSPI) and the Korean Securities Dealers Automated Quotations (KOSDAQ) Pharmaceutical index. We use generalized Dirichlet-multinomial regression (g-DMR) to reveal the dynamic topic distributions over metadata of index values. The results of our analysis, obtained using g-DMR, reveal that a greater focus on specific news topics has a significant relationship with fluctuations in the indices. We also provide practical and theoretical implications based on this analysis.

• Asia-Pacific Journal of Business
• /
• v.11 no.2
• /
• pp.189-206
• /
• 2020

Purpose - The purpose of this study is to clarify the mediating effect of profitability and activity in the relationship between productivity and stock return, assuming that the productivity of the company will affect share prices with the parameters of profitability and activity. Design/methodology/approach - The study extracted productivity indicators, profitability indicators, activity indicators, and share price-related indicators from 1999 to 2018 of non-financial enterprises listed on the securities market, and then classified them into three factors: productivity (labor productivity LP, capital productivity CP), activity (TT), and profitability (net profit rate NI, operating profit ratio OI) through the factor analysis method, and analyzed the impact of each factor on the stock return through steps 1 to 3. Findings - The regression analysis shows that productivity has a significant positive effect on the stock return through the full mediating effect of profitability and activity. Research implications or Originality - In a situation where the relationship between productivity and profitability is not clear, this study is meaningful in that it has empirically analyzed that productivity has a positive effect on the stock return by mediating effects of profitability and activity.

• The Journal of Asian Finance, Economics and Business
• /
• v.9 no.9
• /
• pp.351-360
• /
• 2022

This study aims to determine the factors that can influence investors in selecting stocks in the Indonesian capital market to establish an optimal portfolio, and find phenomena that occurred during the COVID-19 pandemic so that buying interest / the number of investors increased in the Indonesian capital market. This study collection technique uses primary data obtained from the survey questionnaire and secondary data which is market data, stock price movement data sourced from the Indonesia Stock Exchange, Indonesian Central Securities Depository, and Bank Indonesia, as well as empirical literature on behavior finance, investment decision, and interest in buying stock. The method used in this research is the survey questionnaire analysis with the SEM (statistical approach). The results of the analysis using SEM show that investor behavior influences the stock-buying interest, investor behavior, and the stock-buying interest influences investor decision-making. However, risk management does not influence investor-decision making. This occurs when the investigator's psychological capacity produces more decision information by decreasing all potential biases, allowing the best stock selection model to be selected. When the investigator's psychological capacity creates more decision information by reducing biases, the optimum stock selection model can be chosen.

• Asia-Pacific Journal of Business
• /
• v.12 no.3
• /
• pp.37-50
• /
• 2021

Purpose - This study aimed to examine the behavior surrounding the Initial Public Offering (IPO) event of firms within the same conglomerate and the impact of under-pricing and Return on Equity(ROE) on a firm's abnormal stock returns. Design/methodology - This study collected data from 166 South Korean Chaebols, consisting of 355 firms distributed as 202 listed on Korea Composite Stock Price Index (KOSPI) and 153 firms listed on Korean Securities Dealers Automated Quotations (KOSDAQ) from 2000 to 2020. The Capital Asset Pricing Model (CAPM) and the multiple regression analysis were hired to analyze the data. Findings - First, we found an adverse price reaction of IPO listing in the same chaebol group, and firms with higher under-pricing affect other firms' stock prices more adversely within the conglomerate. Next, we explored a negatively significant relation between ROE and the chaebol firms' stock returns during IPO events. Research implications - The novelty of this study is there are not many empirical studies on the impact of IPO within a conglomerate. So, the findings of this study contribute to the literature for analyzing stock's abnormal returns within a conglomerate.

• The Journal of Asian Finance, Economics and Business
• /
• v.10 no.1
• /
• pp.1-8
• /
• 2023

The banking industry regulators have imposed on commercial banks to maintain a certain level of liquidity to ensure that they can meet their obligations to the depositors and third parties. This study examines the factors influencing liquidity creation among commercial banks in Uzbekistan. Specifically, this study examines three internal factors namely, risk assets, deposits, and inter-bank loans on the creation of liquidity in commercial banks of Uzbekistan. This study uses content analysis on financial reports of 33 commercial banks in Uzbekistan over 21 years. This study shows all the factors chosen in this study significantly influence liquidity creation among the commercial banks in Uzbekistan. While deposits and inter-bank loans significantly and positively influence liquidity creation, this study shows that risk assets significantly and negatively influence liquidity creation. Further analysis shows that these three factors contribute to a 92.4% variance in liquidity creation among commercial banks in Uzbekistan. The findings of this study provide valuable insights to the stakeholders in the banking industry on the factors influencing liquidity creation in banks. In addition, this study adds to the existing literature by providing insight into the internal factors' role in influencing liquidity creation in the context of an emerging economy.

• Korea Trade Review
• /
• v.47 no.1
• /
• pp.63-77
• /
• 2022

As customer needs for eco-friendly transportation services increase, strategies of major global shipping companies are being established to meet them. Even if logistics costs increase, more and more shippers are choosing shipping companies that fulfill their social responsibilities through decarbonization, and against this backdrop, global shipping companies want to strengthen corporate social responsiveness and reduce shipping environmental costs. In the post-corona era after COVID-19, it is necessary to review the latest Green Shipping management strategies of shipping companies emerging as a new normal for the shipping and logistics industries. This study aims to explore trends in the latest Green Shipping management strategies of global shipping companies pursuing environmental load suppression in the shipping and logistics fields. Among the previous studies, some studies analyzed the green shipping policies of major shipping countries, but they did not deal with the latest policies over time, and few previous study has conducted a fact-finding analysis on the latest Green Shipping management strategies of major shipping companies at the corporate level. This study attempted to analyze securities reports by major domestic and international shipping companies and to present the latest Green Shipping management strategies by shipping companies.

• The Journal of Information Systems
• /
• v.33 no.1
• /
• pp.115-131
• /
• 2024

Purpose This study aims to analyse the impact of the development of fintech and the emergence of internet primary banks due to the increasing use of smartphones on the performance of traditional local banks from both financial and non-financial perspectives. Return on equity (ROE) and return on assets (ROA) are used to assess the performance differences between the two types of banks and how these differences are affected by their financial characteristics. Design/methodology/approach Using return on equity (ROE) and return on assets (ROA) as indicators, we identified the differences in operating performance between the two types of banks. In addition, this study analysed the impact of financial characteristics on profitability through regression analysis with various control variables. We further studied the impact of non-financial characteristics (customer reviews, social media reactions, etc.) on operating performance. Findings The net interest margin ratio of local banks had a positive impact, while the marketable securities ratio of Internet primary banks had a negative impact. The non-financial analysis shows that the number of customer reviews and social media reactions have a significant impact on the performance of Internet primary banks, suggesting that customer satisfaction and positive market perception are important factors in the performance of Internet primary banks.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
• /
• v.38
• /
• pp.303-325
• /
• 2008

China's "Foreign Trade law" 16.4 revised in 2004 like "Foreign Trade law" 16.2 in 1994 is still stipulated resource restriction to protect domestic resources and it does not satisfy the introduction of article 20 and section (g) of GATT 1994. Through an interpretation of related regulations and China-EU cokes dispute, the paper points out that China's "Foreign Trade law" 16.4 has no validity of the introduction of article 20 and section (g) of GATT 1994. Comparing China's "Foreign Trade law" 16.4 to GATT 1994 20(g), China's "Foreign Trade law" 16.4 does not include important conditions of GATT 1994 20 introduction such as not being arbitrary or unjustifiable discrimination and disguised restriction on international trade. For example, based upon China's "Foreign Trade law" , if she restricts or prohibits important natural resources that Korea mainly relies on China, it will effects not only trade between two countries but also our lives and securities. Hence, it is highly time to analyze China's the Validity of the China's Resource Export-Quota Restrictive Measures under the GATT/WTO. In the process of resolving China-EU cokes dispute in 2004, ministry of Commerce of China shows well its characteristics of dispute settlement and also we can find out EU's logical countermeasures. Therefore, because of the high possibility of disputes between Korea and China in the area of natural resources, Korea needs to pay attention to the China's resource protecting policies, and if it violates GATT 1994 20 introduction and (g), we should consider to sue China to WTO. The paper believes that it will play an important role as an aggressive demand and effect on amendment of China's "Foreign Trade law" in the long term.

• Convergence Security Journal
• /
• v.12 no.5
• /
• pp.3-13
• /
• 2012

Japan came to result in enacting and enforcing the law on rationalization of service pertinent to the Private Detective Service Law in order to rationalize the illegal service realities of private detective service dealers and detective agencies, which were flooded in 2006. Since the enactment of the law, the problems are still taking place in relation to Japanese private detective service as of 2012. However, Japan's regulatory agencies can be known to revise the corresponding statute and to make effort to improve consciousness of agencies in order to improve these problems. Accordingly, it can be considered to be great in implication as for our country's introduction of private investigation service in the future. Arranging these contents, they are as follows. First, it is improvement in problems related to other statutes according to performance of private detective service. Second, it is reinforcement in management of private detective service violators. Third, it is propulsion of rationalization in cost according to a contract of private detective service. Accordingly, it can be considered to be necessary for being newly legislated at the 19th National Assembly from the perspective dubbed development and social right f unction in private investigation industry, by further supplementing Japan's these problems and arranging improvement plans so that the corresponding service called private detective service can do more public function in society.