• Title/Summary/Keyword: Spam mail

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Comparing Feature Selection Methods in Spam Mail Filtering

  • Kim, Jong-Wan;Kang, Sin-Jae
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • 2005.11a
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    • pp.17-20
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    • 2005
  • In this work, we compared several feature selection methods in the field of spam mail filtering. The proposed fuzzy inference method outperforms information gain and chi squared test methods as a feature selection method in terms of error rate. In the case of junk mails, since the mail body has little text information, it provides insufficient hints to distinguish spam mails from legitimate ones. To address this problem, we follow hyperlinks contained in the email body, fetch contents of a remote web page, and extract hints from both original email body and fetched web pages. A two-phase approach is applied to filter spam mails in which definite hint is used first, and then less definite textual information is used. In our experiment, the proposed two-phase method achieved an improvement of recall by 32.4% on the average over the $1^{st}$ phase or the $2^{nd}$ phase only works.

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A Study on the Effective Countermeasure of SPAM : Focused on Policy Suggestion (불법스팸 방지를 위한 개선방안 : 정책적 제안을 중심으로)

  • Sohn, Jong-Mo;Lim, Hyo-Chang
    • Journal of Industrial Convergence
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    • v.19 no.6
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    • pp.37-47
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    • 2021
  • Today, people share information and communicate with others using various information and communication media such as e-mail, smartphones, SNS, etc. However, it is being used in malicious attacks to send a large amount of illegal spam or to use it for fraud by using illegally collected personal information and devices that are vulnerable to security. Illegal spam, smishing, and fraudulent mail(SCAM) cause a lot of direct and indirect damage to companies and users, including not only social costs such as mental fatigue, but also unnecessary consumption of IT infrastructure resources and economic losses. Although there are regulations related to spam, violators of the law are still on the rise by circumventing the law, and victims are constantly occurring, so it is necessary to review what the problem is. This study examined domestic and foreign spam-related regulations and spam-related response activities, identified problems, and suggested improvement countermeasures. Through this study, it was intended to suggest directions for improving spam-related systems in order to block illegal spam and prevent fraudulent damage.

Design and Implementation of The Spam I-Mail filtering System (컨텐츠 필터를 이용한 스팸메일 차단 시스템 설계 및 구현)

  • 김진만;장종욱
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.05a
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    • pp.465-468
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    • 2003
  • E-mail, one of the oldest services in internet becomes very important and essential way to communicate with development of internet. Due to E-mail has a property which is not complete for security, sometimes it is used for purpose of commercial or bad things, therefore it becomes the latest problem to keep off a Spam-mail and commercial advertising E-mail, many ways to keep off were perposed for it. In this paper, I explained how to sort and keep off these Spam-mail and commercial advertising E-mail with three way, prevention by server level, prevention by construction of network level, prevention by client level. we designed a prevention system for Spam-mail and implemented it by Visual Basic.

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Design and Implementation of The Spam E-Mail filtering System (스팸메일 차단 시스템 설계 및 구현)

  • 김진만;장종욱
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2002.11a
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    • pp.413-417
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    • 2002
  • E-mail was very particular way of communication in the past, but it becomes one of daily communication methods now. Due to E-mail has a property which is not complete for security, sometimes it is used for purpose of commercial or badthings, therefore it becomes the latest problem to keep off a Spam-mail and commercial advertising E-mail, many ways to keep off were perposed for it. In this paper, I explained how to sort and keep off these Spam-mail and commercial advertising E-mail with three way, prevention by server level, prevention by construction of network level, prevention by client level. we designed a prevention system for Spam-mail and implemented it by Visual Basic.

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Performance Improvement of Spam Filtering Using User Actions (사용자 행동을 이용한 쓰레기편지 여과의 성능 개선)

  • Kim Jae-Hoon;Kim Kang-Min
    • The KIPS Transactions:PartB
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    • v.13B no.2 s.105
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    • pp.163-170
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    • 2006
  • With rapidly developing Internet applications, an e-mail has been considered as one of the most popular methods for exchanging information. The e-mail, however, has a serious problem that users ran receive a lot of unwanted e-mails, what we called, spam mails, which cause big problems economically as well as socially. In order to block and filter out the spam mails, many researchers and companies have performed many sorts of research on spam filtering. In general, users of e-mail have different criteria on deciding if an e-mail is spam or not. Furthermore, in e-mail client systems, users do different actions according to a spam mail or not. In this paper, we propose a mail filtering system using such user actions. The proposed system consists of two steps: One is an action inference step to draw user actions from an e-mail and the other is a mail classification step to decide if the e-mail is spam or not. All the two steps use incremental learning, of which an algorithm is IB2 of TiMBL. To evaluate the proposed system, we collect 12,000 mails of 12 persons. The accuracy is $81{\sim}93%$ according to each person. The proposed system outperforms, at about 14% on the average, a system that does not use any information about user actions.

Design of A Spammail Control Model Based on Hierarchical Policy (정책기반의 계층적 스팸메일 제어모델 설계)

  • Lee Yong-Zhen;Baek Seung-Ho;Park Nam-Kyu;Lee Sang-Ho
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.2 s.34
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    • pp.143-151
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    • 2005
  • As the internet and I-commerce have been developing. a novel method for marketing is needed. A new advertisement using E-mail is becoming popular, because it has characteristics with low costs and relative efficiency. However. as the spam mails are increasing rapidly, mail service companies and users are deeply damaged in their mind and economically. In this paper, we design a hierarchical spam mail blocking policy through cooperation of all the participants-user, administrator, ISP to cut off the spam mail efficiently and Propose an efficient model to block and manage the spam mails based on the Policy. Also we prove the efficiencies and effectiveness of the proposed model through evaluation process .

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E-mail Sending-Server Authorization Method using a Distance Estimation Algorithm between IP Addresses for Filtering Spam (스팸메일 차단을 위해 IP 주소간 거리 측정 알고리즘을 이용하는 전자우편 발송서버의 권한확인 방법)

  • Yim Hosung;Shim Jaehong;Choi Kyunghee;Jung Gihyun
    • The KIPS Transactions:PartC
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    • v.12C no.5 s.101
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    • pp.765-772
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    • 2005
  • In this paper, we propose E-mail sending-server authorization method using a distance estimation algorithm between W addresses to check whether the E-mail sending server is registered in the domain of mail sending server or belongs to the domain for filtering spam mail. This method utilizes the distance between the IP address of sending server and IP addresses registered in the DNS to figure out that the E-mail sending server exists in the domain to filter spam mail. The experimental result of applying the proposed algorithm to sample E-mails gathered in a large size laboratory says that 88 percents of legitimate E-mails and only 10 percents of spam mails are sent by servers in the same domains of senders. The algorithm may be effectively used to block spam mails sent by servers outside of the domains of mail senders. It may be also hired as a temporary E-mail protecting system until the standard E-mail authorization protocol is fully deployed.

A study on the Filtering of Spam E-mail using n-Gram indexing and Support Vector Machine (n-Gram 색인화와 Support Vector Machine을 사용한 스팸메일 필터링에 대한 연구)

  • 서정우;손태식;서정택;문종섭
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.14 no.2
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    • pp.23-33
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    • 2004
  • Because of a rapid growth of internet environment, it is also fast increasing to exchange message using e-mail. But, despite the convenience of e-mail, it is rising a currently bi9 issue to waste their time and cost due to the spam mail in an individual or enterprise. Many kinds of solutions have been studied to solve harmful effects of spam mail. Such typical methods are as follows; pattern matching using the keyword with representative method and method using the probability like Naive Bayesian. In this paper, we propose a classification method of spam mails from normal mails using Support Vector Machine, which has excellent performance in pattern classification problems, to compensate for the problems of existing research. Especially, the proposed method practices efficiently a teaming procedure with a word dictionary including a generated index by the n-Gram. In the conclusion, we verified the proposed method through the accuracy comparison of spm mail separation between an existing research and proposed scheme.

A fasrter Spam Mail Prevention Algorithm on userID based (userID 기반의 빠른 메일 차단 알고리즘)

  • 심재창;고주영;김현기
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.10a
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    • pp.211-214
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    • 2003
  • The problem of unsolicited e-mail has been increasing for years, so many researchers has studied about spam filtering and prevention. In this article, we proposed a faster spam prevention algorithm based on userID instead of full email address. But there are 2% of false-negatives by userID. In this case, we store those domains in a DB and filter them out. The proposed algorithm requires small DB and 3.7 times faster than the e-mail address comparison algorithm. We implemented this algorithm using SPRSW(Spam Prevention using Replay Secrete Words) to register userID automatically in userID DB.

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A Research on the Intelligent E-mail System Using User Patterns (사용자 패턴을 이용한 지능형 e-메일 시스템의 연구)

  • Lim Yang-Won;Lim Han-Kyu
    • The Journal of the Korea Contents Association
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    • v.6 no.1
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    • pp.64-71
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    • 2006
  • Electronic mail (E-mail) is an integral part of communication for the recent Internet users. However, e-mail has also come to serve as a means to support flood of unwanted spam mails and junk mails having bad purposes. This paper was conducted in order to develop an intelligent e-mail system using user behavior pattern that can prevent these unnecessary information and enable the user to enjoy communication via e-mail in a cleaner environment. The concentrated analysis of the user behavior in terms of using e-mail functions has resulted in better classification between unnecessary and necessary information, thereby facilitating faster disposal of spam mails.

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