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A Multi-Variate Analysis of SMTP Paths and Relays to Restrict Spam and Phishing Attacks in EmailsPalla, Srikanth 12 1900 (has links)
The classifier discussed in this thesis considers the path traversed by an email (instead of its content) and reputation of the relays, features inaccessible to spammers. Groups of spammers and individual behaviors of a spammer in a given domain were analyzed to yield association patterns, which were then used to identify similar spammers. Unsolicited and phishing emails were successfully isolated from legitimate emails, using analysis results. Spammers and phishers are also categorized into serial spammers/phishers, recent spammers/phishers, prospective spammers/phishers, and suspects. Legitimate emails and trusted domains are classified into socially close (family members, friends), socially distinct (strangers etc), and opt-outs (resolved false positives and false negatives). Overall this classifier resulted in far less false positives when compared to current filters like SpamAssassin, achieving a 98.65% precision, which is well comparable to the precisions achieved by SPF, DNSRBL blacklists.
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The Effectiveness of an Electronic-Mail Campaign to Modify Stress Levels, Mood States, and Coping Techniques Among Employed AdultsHoke, Cassandra N. 08 1900 (has links)
The present study was conducted to explore the effectiveness of a worksite stress management program delivered via electronic mail (e-mail). One hundred and thirty-seven employed adults (36 males, 102 females; mean age = 29.46) from several diverse businesses consented to participate. The volunteers completed Cohen's Perceived Stress Scale, the Daily Hassles Scale, the Daily Work Hassles Scale, the TCU Self-Ratings Scales, and a demographic and opinion questionnaire. Individuals in the treatment group received e-mail messages twice weekly and had access to a website for three months about a variety of cognitive-behavioral techniques for managing worksite stress. A MANCOVA of post-intervention stress levels indicated that individuals who received the stress management messages perceived the same amount of stressors and hassles as individuals who did not receive the messages [F (5, 86) = 0.95, p = .45]. However, a MANCOVA of post-intervention perceived mood states revealed a tendency for individuals in the treatment group to be less depressed, anxious, and angry than individuals in the control group [F (3, 92) = 2.44, p = .07]. Demographic variables did not influence the outcome variables and pre- and post-test absenteeism and illness rates were similar for treatment and control groups. Coping skill usage was similar in amount and frequency, but differed in quality between the groups. The findings of the present study indicate that health promotion programs can be feasibly and effectively delivered via e-mail in the worksite.
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A session layer for the X.400 message handling systemVan der Westhuizen, Eugene Daniel January 1990 (has links)
Bibliography: pages 233-235. / The CCITT X.400 Message Handling System resides in the Application Layer of the seven-layer Reference Model for Open Systems Interconnection. It bypasses the services of the Presentation Layer completely to interact directly with the Session Layer. The objectives of this thesis are to show how the general Session Layer may be tailored to be minimally conformant to the requirements of X. 400; to produce a formal specification of this session layer; and to show how this session layer may be implemented on a real system. The session services required by X. 400 are those of the Halfduplex, Minor Synchronization, Exceptions and Activity Management functional units of the CCITT X.215 Session Service Definition. These services, and particularly their use by X.400, are described in detail. State tables describing these services are derived from the general session service state tables. Those elements of the CCITT X. 225 Session Protocol Specification which are required to provide only those services required by X. 400 are described in detail. State tables describing this session protocol are derived from the general session protocol state tables. A formal specification of the session layer for X.400 is presented using the Formal Description Technique Estelle. This specification includes a complete session entity, which characterizes the entire session layer for X.400. A session entity for supporting X.400 is partially implemented and interfaced to an existing X.400 product on a real system. Only the Session Connection Establishment Phase of the session protocol is implemented to illustrate the technique whereby the entire session protocol may be implemented. This implementation uses the C programming language in the UNIX operating system environment.
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The Effects of Task-Based Documentation Versus Online Help Menu Documentation on the Acceptance of Information TechnologyBell, Thomas 05 1900 (has links)
The objectives of this study were (1) to identify and describe task-based documentation; (2) to identify and describe any purported changes in users attitudes when IT migration was preceded by task-based documentation; (3) to suggest implications of task-based documentation on users attitude toward IT acceptance. Questionnaires were given to 150 university students. Of these, all 150 students participated in this study. The study determined the following: (1) if favorable pre-implementation attitudes toward a new e-mail system increase, as a result of training, if users expect it to be easy to learn and use; (2) if user acceptance of an e-mail program increase as expected perceived usefulness increase as delineated by task-based documentation; (3) if task-based documentation is more effective than standard help menus while learning a new application program; and (4) if training that requires active student participation increase the acceptance of a new e-mail system. The following conclusions were reached: (1) Positive pre-implementation attitudes toward a new e-mail system are not affected by training even if the users expect it to be easy to learn and use. (2) User acceptance of an e-mail program does not increase as perceived usefulness increase when aided by task-based documentation. (3) Task-based documentation is not more effective than standard help menus when learning a new application program. (4) Training that requires active student participation does not increase the acceptance of a new e-mail system.
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Electronic mail: attitudes, self-efficacy, and effective communicationKandies, Jerry T. 19 October 2006 (has links)
The purpose of this study was (a) to investigate the functional use of e-mail in a university setting and the relationship of attitudes toward and self-efficacy with email technology, and (b) to evaluate writing effectiveness in an electronic medium. The study also sought to determine if certain personal characteristics could serve as predictor variables for explaining e-mail use, attitudes toward email, and self-efficacy with e-mail technology.
The population of interest was the teaching faculty at Virginia Polytechnic Institute and State University who had a published e-mail address. A random sample of 500 faculty were sent a survey via campus mail. A total of 262 usable responses provided data for statistical treatment which included factor analysis and multiple regression. Additionally, 30 self-selected respondents provided copies of e-mail messages they had written. These messages were rated holistically for writing effectiveness, and the ratings were examined for their relationship with the extent of e-mail use, attitudes toward e-mail, and self-efficacy with e-mail technology.
The items on the attitude toward e-mail scale clustered into two factors, "Usefulness," and "Comfort/Anxiety." The items on the e-mail purposes of use scale also clustered into two factors, "Task Use," and "Social Use." These factors were similar to the ones on the instruments from which this study's instrument was adapted.
The results of the regression analyses indicated that several of the variables were significant predictors of e-mail use, attitudes toward e-mail, and self-efficacy with e-mail technology. An attitude of e-mail's usefulness and self-efficacy with e-mail technology were significant predictors of the extent of e-mail task and social use. Self-efficacy was a significant predictor of positive attitudes of usefulness and comfort. Age was a significant predictor of social use of e-mail as well as of a positive attitude of e-mail's usefulness. Years e-mail had been used was a significant predictor of the extent of e-mail use and of self-efficacy. Higher ranking teaching faculty had more positive attitudes of e-mail's usefulness.
The results of analyses of holistic ratings indicate no significant correlations existed among the variables. Recommendations for instruction and for further research are described. / Ph. D.
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Examining the relationship between training in ethics, work setting, and the ethical reasoning process of I/O psychologists using an electronic mail surveyHoffmaster, Kimberly Ann 01 January 1999 (has links)
No description available.
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Combating the corporate paper war: optimising electronic mail and electronic filingBothma, Marchelle Marelize 11 1900 (has links)
Thesis (M. Tech. (Office management & Technology)) -- Vaal University of Technology / The primary objective of this research project was primarily to investigate filing methods
and mailing practices in the computer support or administrative environment with specific
focus on the abuse of paper.
The research design consisted of an exploratory investigation in selected Higher
Education Institutions in the Province of Gauteng whereby a structured questionnaire was
used as a measuring instrument. The investigation was sub-divided into two categories,
namely, paper-based filing systems and mailing systems as opposed to electronic filing
and mailing systems.
In the empirical findings, analysis and interpretations, correlation and cross-tabulation
were done on all sets of variables in order to determine whether any meaningful
associations could be found.
With reference to the title of this study "Combating the corporate paper war: optimising
electronic mail and electronic filing", it has been proven that the war against paper abuse
is far from over. Perceptions regarding a future paperless office and assumptions that
technology such as the electronic mail facility and electronic filing could assist
organisations to combat paper abuse were unfounded, due to a lack of guidance and
control measures in the corporate environment.
Consequently, it is recommended that an e-filing and e-mailing model be created and
followed in conjunction with specified computer software features in order to counteract
the abuse of paper.
Follow-up research could focus on electronic filing methods versus scanning of
documents for filing purposes.
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Distributed file systems in an authentication systemMerritt, John W January 2010 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries / Department: Computer Science.
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Användaracceptans av utökade e-postsystem : en studie av icke-tekniska utmaningar med grupprogramHoltrin, Erik, Nyman, Patrik January 2005 (has links)
<p>Validerat; 20101217 (root)</p>
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Instant messaging use among university studentsSeng, I No January 2008 (has links)
University of Macau / Faculty of Social Sciences and Humanities / Department of Communication
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