• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.3
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• pp.397-403
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• 2020

With the convenience of real-time conversation, multimedia file and contact sharing services, most people use instant messenger, and its usage time is increasing. Because the messengers contain a lot of user behavior information data, in the digital forensic investigation, they can be very useful evidence to identify user behavior. However, some of useful data can be difficult to acquire or recognize because they are encrypted or deleted. Thus, in order to use the messenger data as evidence, the study of message decryption process and message recovery is essential. In this paper, we analyze the database encryption process of the instant messenger, MalangMalang Talkafe, and propose the method to decrypt it. In addition, we propose the methods to identify the deleted messages and recover from the volatile memory area.

• Journal of the Society of Disaster Information
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• v.10 no.2
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• pp.220-228
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• 2014

A stalking is becoming more diverse and the methods are developing over time as the society has changed over time due to the advancement of information technology but an initial countermeasure seems to be difficult as there is no sufficient legislations against such crimes as stalking. Our country passed laws regulating such stalking at 1999 and four more additional bills were proposed until the 18th National Assembly but they failed to become legalized. Two more additional bills were proposed during 19th National Assembly which are still pending. Crimes such as stalking violates and invades physical and psychological freedom of the victims and the crimes are severely inveterate and intentional. Advanced countries such as the United States, the Great Britain, Germany, and Japan enacted legislations that strictly regulates stalking and also appropriate responses. As these exemplary cases show, it is essential that our country also requires an effective legislations against crime of stalking and protecting a victim of the crime.

• International Journal of Computer Science & Network Security
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• v.22 no.10
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• pp.155-164
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• 2022

The review of known decisions showed that currently there are no systems and technologies for supporting the decision about the possibility of concluding the civil law agreements for medical, therapeutic and dental services. The paper models the decision-making support process on the possibility of concluding the civil law agreements for medical, therapeutic and dental services, which is the theoretical basis for the development of rules, methods and system for supporting the decision about the possibility of concluding the civil law agreements for medical, therapeutic and dental services. The paper also developed the system for supporting the decision about the possibility of concluding the civil law agreements for medical, therapeutic and dental services, which automatically and free determines the possibility or impossibility of concluding the corresponding civil law agreement for the provision of a corresponding medical service. In the case of formation of a conclusion about the possibility of concluding the agreement, further conclusion and signing of the corresponding agreement takes place. In the case of forming a conclusion about the impossibility of concluding the agreement, a request is made for finalizing the relevant agreement for the provision of the relevant medical service, indicating the reasons for the impossibility of concluding the agreement - missing essential conditions in the agreement. After finalization, the agreement can be analyzed again by the developed system for supporting the decision.

• Convergence Security Journal
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• v.22 no.4
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• pp.109-118
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• 2022

Countries around the world have recognized the importance of personal information protection and have discussed protecting the rights of data subjects in various forms such as laws, regulations, and guidelines. PbD (Privacy by Design) is one of the concepts that are commonly emphasized as a precautionary measure for the protection of personal information, and it is starting to attract attention as an essential element for protecting the privacy of information subjects. However, the concept of PbD to prioritize individual privacy in system development or service operation in advance is still only at the declarative level, so there is relatively little discussion on specific methods to implement it. Therefore, this study discusses which principles and rights should be prioritized to implement PbD based on the basic principles of GDPR and the rights of data subjects. This study is meaningful in that it suggests a plan for the practical implementation of PbD by presenting the privacy considerations that should be prioritized when developing systems or services in the domestic environment.

• Journal of Korea Spatial Information System Society
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• v.5 no.1 s.9
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• pp.5-12
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• 2003

The purpose of this paper is to present guidelines on technical GIS policy for integrating GIS with emerging information technologies and infrastructure systems for national GIS development. These guidelines are expected to advance the development of GIS and stimulating GIS industry, by anticipating potential problems. This paper consists of foul parts. After Introduction, section two covers the present and upcoming status of essential information technologies including communications, security, LBS, Ubiquitous and standardization. Section 3 describes the guidelines for combing GIS and emerging IT for national GIS development. The final section summarizes and derives conclusions.

• Journal of the Society of Disaster Information
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• v.8 no.3
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• pp.287-296
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• 2012

This study is analysis of the existing domestic terrorism factors and suggest countermeasures for political leadership that can occur to the precautionary terror occasion of the presidential election approached 100 days in the future. Political terror caused mainly achieved peak of Ideology or social conflict by Politically alienated class. Common cause is most likely to occur when the party or the government want to attack a target or can not stand disadvantaged and lose that I suppert the party or the government. 21st century political terror is occurred with Misfits of complaints expressed or social conflict more frequency than attack used random people, new weqpon and bomb. It is interpreted that issued as a drastic measure from individual complaint because of increased polarization of wealth by separate into group and fallen law and order but also we are not familiar with the political compromises. Personal safety escort mission is essential condition of political activity that Absolute personal protection and to come up with a large number of voters for best result. Thus security guard ought to professional security activity depend on gathered situation, location and regional feature for perfect protection service.

• Journal of Internet Computing and Services
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• v.22 no.6
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• pp.129-140
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• 2021

The next generation mBcN should be built to cooperate with the wireless network to support hyper-speed and hyper-connectivity. In this paper, we propose a network architecture for the cooperation mBcN and 5G commercial network and architecture of the cooperative security gateway required for the cooperation. The proposed cooperative security gateway is between gNB and UPF to support LBO, SFC, and security. Our analysis shows that the proposed architecture has several advantages. First of all, user equipment connected with the mBcN can be easily connected through the 5G commercial radio network to the mBcN. Second, the military application traffic can be transmitted to mBcN without going through the 5G core network, reducing the end-to-end transmission delay without causing the traffic load on the 5G core network. In addition, the security level of the military application can effectively be maintained because the user equipment can be connected to the cooperative security gateway, and the traffic generated by the user equipment is transmitted to the mBcN without going through the 5G core network. Finally, we demonstrate that LBO, SFC, and security modules are essential functions of the proposed gateway in the 5G test-bed environment.

• Journal of Digital Convergence
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• v.15 no.8
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• pp.183-193
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• 2017

Digital accredited certificates issued under the Digital Signature Act provide essential functionalities for online service, so certificates are used for various services such as online banking, e-government. However, certificates can be stolen by hackers and users need to install separate software to use certificates. Recently FIDO, which aims to solve the problems of password-based authentication and the lack of interoperability between authentication methods, is used for biometric authentication and TrustZone, hardware-based secure environment, is used for safe smartphone usage. In this paper, the new service method is suggested which uses FIDO-based biometric authentication and stores certificates in TrustZone. This method can not only improve security and convenience but also be easily applied to the service because it uses built-in functionalities of new smartphones such as biometric sensors and TrustZone. It is expected that people can use certificates in a safe and convenient way with this method.

• Journal of KIISE:Computer Systems and Theory
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• v.36 no.5
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• pp.387-395
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• 2009

The establishment of security architecture is essential because security vulnerabilities occur such as user's unjustifiable connection for the opened gateway and access to resources without permission in OSGi service platform environment. In this paper, it proposes a authentication technique for an Automatic user authentication which is used the Symmetric Key and the Service bundle authentication to consider the constraints of the hardware in the OSGi service platform environment. Typically, the type of entering a password is used for the user authentication mechanism however OSGi platform environment studies not entering the password but using MAC address and encrypted identifier of the automatic user authentication mechanism because the devices are limited in their input. In this paper, the Symmetric Key is used for bundle authentication mechanism. Therefore operation becomes quick and secure authentication process has been successfully completed by using the time data and a ticket which contains a license. Based on these two different authentication mechanisms, it could eliminate the constraints of resources and improve the convenience of users and administrators. Also it shows an effect from omitting the waiting time to enter a password and reducing operations which need for authentication in the OSGi service platform environment.

• The KIPS Transactions:PartC
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• v.9C no.2
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• pp.181-188
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• 2002

There are recently a lot of inconvenience because every client should be set to the proxy server on the browser in order to control the access by means of the client authentication in the proxy server. The client authentication technology using the transparency cache in this paper will be transparently used for every user in the internet which option of the authentication function is simply set in the cache server. In addition, the administrator will get the benefit since he can control the traffic of each client and strengthen the security. And also, this system is expected to use in the eCRM deeply rotated to the tendency of the client in the field of the e-commerce like shopping mall in the internet since the administrator can monitor the pattern of the client using the internet. This technique can be applied to the company affiliated research center, the EC website, and the military where it is essential for the tight security even though there are no additional security devices.