Cryptographic Message Syntax (CMS) is a standard for protecting messages cryptographically. Using CMS, messages can be protected in different content types such as signed-data, enveloped-data, digested-data and authenticated-data. CMS is architected around certificate based key management and symmetric cryptography. In this thesis, a lightweight CMS envelope is proposed for the mobile phones which have limited memory and processing power, in order to provide the privacy of the data either stored on them or exchanged by means of multimedia messaging (MMS) and e-mail. A sample prototype is implemented on mobile phone which makes use of the proposed lightweight CMS. The prototype is compared with standard CMS in terms of application size and performance. The application size decreases approximately by 35% and the envelope preparation duration is much shorter with lightweight CMS in comparison to standard CMS.

Abstract The market environment of Mobile Phone Industry has had rapid change in the past decade. It is almost same important to gain the loyalty of existing customers as to gain the new customers in the current competitive environment. For many companies in this industry, Customer Relationship Management has been become a significant issue in their strategies. This research is based on the concept of Customer Relationship Management. The purposes of this research are to probe the performance of Customer Retention Programs and the churn reason in mobile phone industry. The research datum were collected from TAT Corp.(TransAsia Telecommunications) including Customer Retention Programs as ¡§Second Honeymoon Program¡¨, ¡§New Second Honeymoon Program¡¨ and ¡§Talking Reward Program¡¨ and a survey from the customers who had been deactivated in February and March of the year 2002. The analysis of the retention programs show significantly relevant on AGE, GENDER, CUSTOMER LEVELS, TENURE, and RATE PLAN factors. The inspection results of survey datum in the churn reasons are explained individually. The suggestions are made after discussing the policies and strategies of TAT Corp.

In this dissertation, different from the conventional PIFA structure, the novel internal loop and slot antennas suitable for multiband mobile phone application are proposed. The loop antennas here use the technique of meandering the loop pattern to control the frequency ratio of the three resonant loop modes, and then the multiband operation can be obtained. For the slot antenna, different from the conventional slot antenna operating in a half-wavelength, the monopole slots antenna operating in it¡¦s quarter-wavelength mode are proposed. By properly adjusting the position of the monopole slot and the tuning stub of the microstrip feedline, the monopole slot antenna can achieve the multiband operation with a small occupied area in the mobile phone. In addition, the user¡¦s hand and head effects on the loop antenna are also studied. The obtained results indicate that, when the user¡¦s hand and head is close to or cover a certain portion of the antenna, large decrease in the antenna¡¦s radiation efficiency and great distortion in the antenna¡¦s radiation pattern will occur for all the three excited resonant modes of the loop antenna, no matter the unbalanced or balanced modes. Further, the efficiency drops caused by the user¡¦s hand and head over the GSM900 band are much larger than that over the GSM1800/1900 bands.

<p>The purpose with this study is to find out how the mobile phone and the Village Pay Phone from Grameen Telecom have been implemented into women’s life in rural Bangladesh. It also aims to study how the women have become empowered by this program. The sample constitutes sixteen female owners. A purposeful cluster sampling was used to depict six villages from various parts of Bangladesh. When arriving in the villages a snowball sampling method was used to find female VPP owners. The sampling method was chosen to include a sample of various characteristics. The study has a hermeneutic phenomenological approach, which aims to find out how the women experience the VPP and what meaning the women put in it. To collect empirical data interviews with open questions were used that opened up for conversation and the possibility to understand a range of experiences and nuances of meanings. The findings indicate that the majority of the women handed over the VPP to their husband or a male relative. The reason why is the families’ pressure on them to adjust to Purdah and seclusion, too much domestic work, lack of education, or because of the attitude among men and women both that business is a male domain. The study shows that women mostly gained some prestige. Also, they got a greater self-esteem to meet strangers since the VPP made them meet more people. But it has also brought quarrels and broken some friendships. All women are now more able to call family and relatives when they needed or wanted to and said that they have full access to use the mobile phone for this purpose. Still many are put in a dependency relation to others as they need help to use it. The women, however, are no longer owners of a status symbol because the mobile phone is more available for others today, but they are still known by name. Their homes do no longer attract visitors as it once did during the initiation of the program. There has also been a significant decrease in demand for the VPP that has lessened the income much and some have become even poorer from the VPP and women seldom benefitted personally from the profit. A few of the women mentioned that the family atmosphere had improved but most of them did not say that they had gained influence in the family as a result of the VPP.</p>

With its mixing of real and virtual, Augmented Reality (AR) is a technology that has attracted lots of attention from the science community and is seen as a perfect way to visualize context-related information. Computer generated graphics is presented to the user overlaid and registered with the real world and hence augmenting it. Promising intelligence amplification and higher productivity, AR has been intensively researched over several decades but has yet to reach a broad audience. This thesis presents efforts in bringing Augmented Reality to mobile phones and thus to the general public. Implementing technologies on limited devices, such as mobile phones, poses a number of challenges that differ from traditional research directions. These include: limited computational resources with little or no possibility to upgrade or add hardware, limited input and output capabilities for interactive 3D graphics. The research presented in this thesis addresses these challenges and makes contributions in the following areas: Mobile Phone Computer Vision-Based Tracking The first contribution of thesis has been to migrate computer vision algorithms for tracking the mobile phone camera in a real world reference frame - a key enabling technology for AR. To tackle performance issues, low-level optimized code, using fixed-point algorithms, has been developed. Mobile Phone 3D Interaction Techniques Another contribution of this thesis has been to research interaction techniques for manipulating virtual content. This is in part realized by exploiting camera tracking for position-controlled interaction where motion of the device is used as input. Gesture input, made possible by a separate front camera, is another approach that is investigated. The obtained results are not unique to AR and could also be applicable to general mobile 3D graphics. Novel Single User AR Applications With short range communication technologies, mobile phones can exchange data not only with other phones but also with an intelligent environment. Data can be obtained for tracking or visualization; displays can be used to render graphics with the tracked mobile phone acting as an interaction device. Work is presented where a mobile phone harvests a sensor-network to use AR to visualize live data in context. Novel Collaboration AR Applications One of the most promising areas for mobile phone based AR is enhancing face-to-face computer supported cooperative work. This is because the AR display permits non-verbal cues to be used to a larger extent. In this thesis, face-to-face collaboration has been researched to examine whether AR increases awareness of collaboration partners even on small devices such as mobile phones. User feedback indicates that this is the case, confirming the hypothesis that mobile phones are increasingly able to deliver an AR experience to a large audience. / On the day of the defence date the status on articles III and VIII was: Accepted.

Mobiltelefonen som ett objekt har en stor betydelse för ungdomarna i dagens samhälle. Unga människor uppfattar sin mobiltelefon som en förlängning av sig själva och kan inte uthärda tanken på att vara borta från den. Men i olika situationer som tillexempel ett reklamationstillfälle, har den unga konsumenten inget annat val än att lämna in sin mobiltelefon för reparation. Reklamation är något som är oundvikligt och kan ses som ett misslyckande i sig, men det är hanteringen av reklamationen som avgör om den anses vara lyckad eller misslyckad för kunden.Denna studie syftade till att undersöka relationen mellan den unga konsumenten och deras mobiltelefon och hur detta förhållande kan påverka varför de uppfattar en reklamation som misslyckad. Genom sju intervjuer har vi bett våra respondenter att prata om deras specifika reklamationstillfälle och hur de använder sin mobiltelefon i vardagen.Resultaten visade att de främsta anledningarna till att våra respondenter funnit sin hantering av reklamationen som ett misslyckande berodde på faktorer såsom väntetid, merkostnader, dålig ersättningsprodukt och ovänliga personal. Det visade också att våra respondenter har en anknytning till sin mobiltelefon och på grund av detta förhållande kan ovannämnda faktorer komma att ändras beroende på hur fästa en individ är till hans eller hennes produkt. / The mobile phone as an object has a great meaning for the youth in today's society. Young people perceive their mobile phone as an extension of themselves and cannot bear the thought of being apart from it. However, in different situations such as a customer complaint handling, the young customer has no other option but to hand it in for reparation. The customer complaints is something that is unavoidable and can be seen as a failure in itself but it is the handling of the customer complaint that decide if a customer complaint has been successful or not.This study aimed to investigate the relationship between the young consumer and their mobile phone and how this relationship might affect why they perceive a customer complaint handling as failed. Trough seven conducted interviews we asked our respondents to talk about their specific customer complaint situation and how they use their mobile phone.The results showed that the main reasons why our respondents found their complaint handling as failed depended on factors such as, waiting time, additional costs, poor substitute product and unfriendly personnel. It also showed that our respondents have an attachment to their mobile phone and because of this relationship the aforementioned factors might change dependent on how attached an individual is to his or her product.

The purpose with this study is to find out how the mobile phone and the Village Pay Phone from Grameen Telecom have been implemented into women’s life in rural Bangladesh. It also aims to study how the women have become empowered by this program. The sample constitutes sixteen female owners. A purposeful cluster sampling was used to depict six villages from various parts of Bangladesh. When arriving in the villages a snowball sampling method was used to find female VPP owners. The sampling method was chosen to include a sample of various characteristics. The study has a hermeneutic phenomenological approach, which aims to find out how the women experience the VPP and what meaning the women put in it. To collect empirical data interviews with open questions were used that opened up for conversation and the possibility to understand a range of experiences and nuances of meanings. The findings indicate that the majority of the women handed over the VPP to their husband or a male relative. The reason why is the families’ pressure on them to adjust to Purdah and seclusion, too much domestic work, lack of education, or because of the attitude among men and women both that business is a male domain. The study shows that women mostly gained some prestige. Also, they got a greater self-esteem to meet strangers since the VPP made them meet more people. But it has also brought quarrels and broken some friendships. All women are now more able to call family and relatives when they needed or wanted to and said that they have full access to use the mobile phone for this purpose. Still many are put in a dependency relation to others as they need help to use it. The women, however, are no longer owners of a status symbol because the mobile phone is more available for others today, but they are still known by name. Their homes do no longer attract visitors as it once did during the initiation of the program. There has also been a significant decrease in demand for the VPP that has lessened the income much and some have become even poorer from the VPP and women seldom benefitted personally from the profit. A few of the women mentioned that the family atmosphere had improved but most of them did not say that they had gained influence in the family as a result of the VPP.

New technologies gives us possibility to step to new, more automated, level and to guarantee bigger efficiency. It requires comprehensive perfection and stepping to higher level. The ability of human being to analyze and process information flows is quite limited and requires big time recourses, that’s why complex of technical and programmable instrumentality would be needed to guarantee exactness of information, timeliness, automated information processing. In these days companies more are discussing about the possibilities how to computerize the activity process than about the need of this process generally. In any activity important is exact, timeliness and automated information. By the way, we must not forget that any program equipment will not fulfill all the job: to fulfill the tasks we need to have human recourses who will be able to use this program equipment as a tool, who will have ability to analyze and estimate received results. Only in this way there is possibility to increase efficiency with the help of program equipment. There are four production lines connected in one mill, that can work separately according their production capacity. Many big companies in their activity already long time are using mobile telecommunications. But only in these years, when the amount of jobs and speed of life is increasing and after new technologies came in to the life, mobile technologies are more and more entering to the business of big or middle companies as well as... [to full text]

Magistrinio darbo tikslas yra – atlikti NFC technologijos ir su ja suderinto mobiliojo telefono analizę bei pasiūlyti įvairių paslaugų realizavimo mobiliajame NFC telefone sprendimus. Šiame darbe išsiaiškinama NFC technologijos veikimas bei panaudojimo sritys ir teikiama nauda. Nagrinėjama Nokia 6131 NFC mobiliojo telefono architektūra ir sprendžiamos jo panaudojimo galimybės elektroninių paslaugų įgyvendinimo uždaviniuose. Pateikiamas NFC telefono naudingumas pritaikant jį elektroninėms paslaugoms. Suprojektuoti viešojo transporto elektroninio bilieto įgyvendinimo modeliai. Pateikti siūlomų sprendimų pranašumai. Išanalizuotas ir pateiktas keleto paslaugų talpinimo mobiliajame telefone sprendimas. Aprašomas telefono atminties paskirstymas paslaugoms bei jų valdymas. Pasiūloma elektroninių paslaugų naudojant NFC mobiliąsias technologijas diegimo ir aptarnavimo infrastruktūra Panaudojant emuliatorių pademonstruojami pasiūlytiems sprendimams spręsti tinkamų aplikacijų pavyzdžiai. / The goal of Master Thesis is - the NFC technology and the coordinated analysis of the mobile phone and offer a variety of marketing services for mobile NFC phone solutions. In this paper, clear NFC technology and the use of areas of operation and benefits. Examining the Nokia 6131 NFC mobile phone architecture and its use in addressing the possibility of the electronic services of the tasks. Provide mobile NFC phone utility of the electronic services. Designed for the public transport e-ticket implementation models. Provide the advantages of the proposed solutions. Analyzed and presented in a number of hosting services for mobile phone solution. Describes the distribution of services in the phone memory, and their management. Offered e-services using NFC mobile technology implementation and service infrastructure. Using the emulator showing the proposed solutions address the application of appropriate examples.

Tobulėjant mobiliesiems telefonams ir kitoms technologijoms, atsiranda galimybė pakeisti arba papildyti rinkoje naudojamus grynuosius pinigus jiems ekvivalenčiais elektroniniais pinigais. Elektroniniai pinigai yra viena naujausių atsiskaitymo formų ir jos realizacija rinkoje yra ribota. Darbe buvo realizuotas Stefan Brands elektroninių pinigų modelis naudojant Java platformas kompiuteryje ir mobiliajame telefone. Buvo ištirtas šių realizacijų efektyvumas ir pastebėta, kad realizacija kompiuteryje yra 100 kartų greitesnė negu mobiliajame telefone. Buvo pasiūlyta ir realizuota aritmetinių funkcijų (sudėties, skirtumo, modulio, modulinės eksponentės, postūmio į dešinę) klasė Java Card platformoje. Modulinė eksponentė buvo realizuota RSA algoritmo pagalba. Darbe pateiktas šios realizacijos greičio įvertis. Dėl lėto funkcijų vykdymo pasiūlytas mišrus vartotojo dalies protokolų realizacijos modelis. Darbe pateikiama techninės ir programinės įrangos analizė, reikalinga norint atlikti elektroninių pinigų realizaciją. Taip pat atlikta kriptografinių ir matematinių metodų apžvalga, naudojamų Stefan Brands elektroninių pinigų modelyje. / As mobile phones and technology advance new opportunities for implementation of elektronic money systems become possible. Electronic money is one of the latest methods for paying for goods and there are just a few implementations. In this work implementation of Stefan Brands electronic money model was performed. Stefan Brands protocol was implemented using Java langauge in standard computer and in mobile phone. Efficiency of these implementations was estimated and it was found that implementation on mobile phone is approximetly 100 times slower using Java ME platform. A library for for doing arithmetic operations like addition, subraction, modulus, modular exponentiation, right shift, etc. was implemented using smart card enviroment. As it is not possible to use cryptographic processor directly, RSA encryption scheme was used to perform modular exponention. Results of implementation speed were given and it was concluded that whole client side implementation using Java Card enviroment was two slow so mixed model was suggested. This work also consist of technical and software analysis needed to perform electronic money implementation. Also a brief review of cryptographic ant mathematic methods used in Stefan Brands digital cash system was performed.