• The Journal of Society for e-Business Studies
• /
• v.10 no.3
• /
• pp.49-65
• /
• 2005

This paper is a research on the dynamic signature verification of error rate which are false rejection rate and false acceptance rate, the size of signature verification engine, the size of the characteristic vectors of a signature, the ability to distinguish similar signatures, and so on. We suggest feature extraction and comparison method of the advanced signature verification. Also, we have implemented web authentication server with Java technology for supporting various OS Platforms and designed for more efficient user interfaces.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2001.04b
• /
• pp.1177-1180
• /
• 2001

전화를 통해 인터넷 정보를 들을 수 있는 보이스 포탈(Voice Portal) 서비스가 인기를 얻고 있다. Voice Portal 서비스란 알고자 하는 정보를 Speech Recognition System에 음성으로 명령하면 전화를 통해 음성으로 원하는 정보를 듣는 서비스이다. Authentication의 절차를 수행하는 SMS (Short Message Service) 서버 Module, PSTN과 Database 서버사이의 Interface를 제공하는 CTI (Computer Telephony Integration) Module, CTI 서버와 WWW (World Wide Web) 사이의 Voice XML Module, 정보를 검색하기 위한 Searching Module들이 필요하다. 본 논문은 Speech Recognition technology를 기반으로 한 CTI Module 설계를 구현하였다. 또한 인정 방식으로 Random한 일회용 password를 기반으로 한 SMS Authentication을 택하므로 더욱 더 안정된 서비스 제공을 목적으로 하였다.

• Proceedings of the Korea Multimedia Society Conference
• /
• 2004.05a
• /
• pp.87-90
• /
• 2004

현재 구축되고 있는 대부분의 업무용 시스템은 C/S 환경에서 벗어나 인터넷이라는 매체를 통해 하나의 웹 정보시스템으로 구축되어지고 있고 이를 업무시스템으로 활용하고 있다. 하지만 웹을 통한 정보 제공은 다수의 사용자에게 노출되어 있는 상태이며 여러 가지 보안 위험에 노출되어있는 것이 사실이다. 특히 Web시스템 초기 인증부분은 사용자의 ID 와 Password가 평문 이나 다름없는 단순인코딩 상태로 노출되는 문제점이 있다. 본 논문에서는 이러한 업무시스템의 불안전한 인증 시스템을 보완하고자 MD5 와 Crypt 함수에 기반 한 인증시스템의 구축을 위하여 웹 인증 메커니즘을 제안하고, 실제 인증 시스템에 적용하여 구현하였다.

• Journal of Internet Computing and Services
• /
• v.19 no.5
• /
• pp.55-66
• /
• 2018

Since existing server-based authentications use vulnerable password-based authentication, illegal leak of personal data occurs frequently. Since this can cause illegal ID compromise, alternative authentications have been studied. Recently token-based authentications like OAuth 2.0 or JWT have been used in web sites, however, they have a weakness that if a hacker steals JWT token in the middle, they can obtain plain authentication data from the token, So we suggest a new authentication method using the verification token of authentic code to encrypt authentication data with effective time. The verification is to compare an authentication code from decryption of the verification-token with its own code. Its crypto-method is based on do XOR with ECDH session key, which is so fast and efficient without overhead of key agreement. Our method is outstanding in preventing the personal data leakage.

• The Journal of the Korea Contents Association
• /
• v.15 no.11
• /
• pp.501-508
• /
• 2015

Most web sites, information systems use the ID/Password technique to identify and authenticate users. But ID/Password technique is vulnerable to security. The user must remember the ID/Password and, the password should include alphabets, numbers, and special characters, not to be predicted easily. User also needs to change your password periodically. In this paper, we propose the user authentication method that the user authentication information stored in the external storage to authenticate a user. If another person knows the ID/Password, he can't log in a system without the external storage. Whenever a user logs in a system, authentication information is generated, and is stored in the external storage. Therefore, the proposed user authentication method is the traditional ID/Password security technique, but it enhances security and, increases user convenience.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.24 no.5
• /
• pp.769-780
• /
• 2014

In general, internet users need to remember several IDs and passwords when they use diverse web sites. From an effective management perspective, SSO system was suggested to reduce user inconvenience. Kerberos authentication, which uses centralized system management, is a typical example of a broker-based SSO authentication model. However, further research is required, because the existing Kerberos authentication system has security vulnerability problems of password and replay attacks. In SSO authentication systems, a major security vulnerability is the replay attack. When user credentials are seized by attackers, an authorized session can be obtained through a replay attack. In this paper, an improved SSO authentication model based on the broker-based model and a secure lightweight SSO mechanism against credential replay attack is proposed.

• The KIPS Transactions:PartC
• /
• v.14C no.4
• /
• pp.321-330
• /
• 2007

This paper proposes a two-phase server login authentication system by XML-Signature schema extension to protect server's information resources opened on network which offer various web contents. A proposed system requests and publishes XML-based certificate through on-line, registers certificate extension information provided by CA(Certification Authority) to XCMS(XML Certificate Management Server), and performs prior authentication using user's certificate password. Then, it requests certificate extension information added by user besides user's certificate password and certificate extension information registered in XCMS by using SOAP message, and performs posterior authentication by comparing these certificate extension information. As a result, a proposed system is a security reinforced system compared with existing systems.

• The KIPS Transactions:PartC
• /
• v.18C no.5
• /
• pp.293-302
• /
• 2011

The various information services can be delivered by smartphone through advanced high-speed mobile communication. A smartphone is a mobile device that offers more powerful computing capacity than feature phone. Therefore this device can provide such as web surfing, editing documents, playing video, and playing games. A lot of personal information stored on smartphone. Because it has High usability. Personal information Leaks if the smart phone is lost or stolen may become a big problem. In this paper we have analyzed existing method for providing secure storage and user authentication on mobile platform and derived security requirement. Therefore we propose the following scheme that satisfy security requirement. Proposed scheme providing secure storage with preventing authentication bypass, and availability from damaged data to access secure area.

• Convergence Security Journal
• /
• v.12 no.1
• /
• pp.17-25
• /
• 2012

SQL Injection techniques disclosed web hacking years passed, but these are classified the most dangerous attac ks. Recent web programming data for efficient storage and retrieval using a DBMS is essential. Mainly PHP, JSP, A SP, and scripting language used to interact with the DBMS. In this web environments application does not validate the client's invalid entry may cause abnormal SQL query. These unusual queries to bypass user authentication or da ta that is stored in the database can be exposed. SQL Injection vulnerability environment, an attacker can pass the web-based authentication using username and password and data stored in the database. Measures against SQL Inj ection on has been announced as a number of methods. But if you rely on any one method of many security hole ca n occur. The proposal of four levels leverage is composed with the source code, operational phases, database, server management side and the user input validation. This is a way to apply the measures in terms of why the accident preventive steps for creating a phased step-by-step response nodel, through the process of management measures, if applied, there is the possibility of SQL Injection attacks can be.

• The Journal of Society for e-Business Studies
• /
• v.9 no.1
• /
• pp.285-301
• /
• 2004

Public service provision through internet is one of major parts for e-government implementation. It is essential to link the internal administrative network with internet to provide the services through internet and to support kiosks through internet, which should result in critical issues for security. A relay server, as a front server for the public service processing system and a web server, a control server for kiosks, are placed between the public service processing system and kiosks to solve those security issues. It is the way to solve security issues through protecting direct communication between the public service processing system and a web server and authenticating a relay server and a web server through authentication process. In the implementation of the system this paper provide a design for an architecture model of the public service processing system through internet, which are aiming to develop high level of the quality system effectively, to reduce the risk of initial stage of development, and to reduce the incurring cost due to reworks.