This thesis compares the impact on disk performance in a GNU/Linux  environmentwith three encryption algorithms: AES,  Serpent and Twofish in three different implementations: DM-crypt, Loop-AES and Truecrypt. For all three algorithms a key length of 256 bits is used.The thesis shows that the least performance impact during data encryption, and thus file writing, is reached by using AES or Twofish encryption implemented in DM-crypt or TrueCrypt. The thesis shows that some data operations with a sufficiently low processor utilization barely affects disk performance at all if encrypted using the optimal implementation and algorithm.It is also discovered that the performance impact during data decryption, or file reading, can be minimized by using the most efficient implementation and algorithm. The best results are met with the AES or Twofish cipher, regardless of implementation.An important conclusion that  is  drawn is that it is hard to determine a superior encryption solution for all purposes. However, by reviewing and examining the collected data from all aspects of disk performance the AES implementation in TrueCrypt is, with small marginals, determined to be the most optimal..

I det här arbetet har jag undersökt möjligheten att synkronisera lagrad kalenderdata mellan två olika system.Mitt arbete beskriver ett API, som i ena änden kommunicerar med Xcerion Baxide-Web Services, och i den andra änden med en mobil enhet med implementerat stöd för Exchange ActiveSync (t.ex. en iPhone eller Android).Med hjälp av Exchange ActiveSync-protokollet kan man synkronisera bland annat kalender, kontakter, e-post, anteckningar och påminnelser mellan flera klienter genom en Exchange Server. Dock hamnade all implementation utöver kalendersynkronisationen av Exchange ActiveSync redan från början utanför examensarbetets ramar.Microsoft tillhandahåller en mycket detaljerad dokumentation över Exchange ActiveSyncprotokollet. Dessutom, bland annat med hjälp av Microsoft Exchange Server 2010 och programmetWireShark kunde trafiken från en redan fungerande implementation av protokollet avlyssnas.Kommunikationen mellan en klient och en Exchange Server kan antingen ske över HTTP eller HTTPS där data transporteras kodat i WBXML. Av säkerhetsskäl är det dock rekommenderat att en Exchange Server inte tillåter trafik över HTTP.Innan själva implementationen analyserades protokollets struktur samt vilka nödvändiga metoder som behövdes för kalendersynkronisationen.

Cloud Computing är det stora modeordet i IT-världen just nu. Det har blivit mer och mer populärt på senare år men frågor har uppstått om dess prestanda och säkerhet. Hur säkert är det egentligen och är det någon större skillnad i prestanda mellan en lokal server och en molnbaserad server? Detta examensarbete tar upp dessa frågor. En serie prestandatester kombinerat med en litteraturstudie genomfördes för att få fram ett resultatet för detta examensarbete. Denna rapport kan komma att vara till nytta för de som har ett intresse av Cloud Computing men som saknar någon större kunskap om ämnet.

This master thesis is a part of the DySCAS project at ENEA. The purpose of this thesisproject is to add support for streaming media and USB support to the DySCAS demonstratorplatform.To achieve this, some of the widely used middlewares available today were studied. The onethat proved to be of most interest is CORBA. Although CORBA?s solution to streamingmedia couldn?t be used due to their use of object programming, the CORBA solution didprovide some interesting thoughts regarding how the USB devices should be handled, in thiscase their ?resource inspector? and ?trading service?.Ethernet was the chosen network to support streaming media.

Vårterminen 2006.

The report aims to investigate how well a certain type of affordable embedded single board computer can hold up against today's more expensive computers in a computer system by doing various tests on a system with the specified requirements. The system has a Raspberry Pi as the single board computer which task is to control a camera based on coordinates obtained from a server as well as capture and stream a video signal on a network.The researches were conducted to check how much network traffic a single-chip computer sent in different video formats and how much CPU utilization was required. Studies were also made to ensure the accuracy of the camera control. The researches have been experimental, where several tests have been performed and analyzed.The results show that a sufficiently good accuracy can be obtained from the camera steering unit, in which two different servos have been investigated. When the video format MJPEG and H.264 are used, the single-chip computer is able to transmit a video signal up to 1280x720 at 15 fps.

I have been studied Microsoft SharePoint on behalf of Prevas in Karlstad.The purpose of my work was to see if Microsoft SharePoint was what Prevas wanted as a replacement for the existing intranet, which they are not satisfied with today.My work was a kind of foundation for Prevas so they could make a decision in this matter.The work began with installing SharePoint at one single server at Prevas. We used a virtual technology (VMware) at the installation, which can be described as that we created two ?miniservers? in a bigger server, one for SharePoint and the other for storing the information. This kind of technology is strongly advancing. The main work consisted of setting up the structure for the navigation and designing both the portal and the local homepage for Prevas Karlstad.

This report describes the work with creating a CMS (Content Manager System). A CMS is a web tool so you easy can publish materials on your web page. With a CM Scan you can without any knowledge of programming web pages create and maintain a web page. This will result in that you and your organisation save time and money. You can also split the responsibility for the webpage in different roles, but still keep the control. We have chosen to create our CMS in a script language called php4 and with the database server MySQL, we have also used JavaScript a lot.

Examensarbetet, 15 poäng har utförts på högskolan i Kalmar. Input Soft AB är ett företag som är beläget i Strängnäs. Uppdraget för projektarbetet bestod av att utforma en webbbaserad givarservice till Myrorna. Myrorna använder idag fleetIT som är ett program utvecklat av Input Soft AB för registrering/hämtning av gåvor till Myrorna. Denna webbaserade givarservice förenklar och effektiviserar arbetet för Myrorna genom att användarna själva går in via Internet och registrerar sina gåvor istället för som idag då registreringen sköts helt av personalen i Sätra.

The report aims to investigate how well a certain type of affordable embedded single board computer can hold up against today's more expensive computers in a computer system by doing various tests on a system with the specified requirements. The system has a Raspberry Pi as the single board computer which task is to control a camera based on coordinates obtained from a server as well as capture and stream a video signal on a network.The researches were conducted to check how much network traffic a single-chip computer sent in different video formats and how much CPU utilization was required. Studies were also made to ensure the accuracy of the camera control. The researches have been experimental, where several tests have been performed and analyzed.The results show that a sufficiently good accuracy can be obtained from the camera steering unit, in which two different servos have been investigated. When the video format MJPEG and H.264 are used, the single-chip computer is able to transmit a video signal up to 1280x720 at 15 fps.

AbstractAs a developer of database-driven applications you will be faced with difficult choices, when it comes to choosing database, server and programming language. For the result to be satisfactory it requires the different techniques to interact well with each other and also fulfill performance expectations. This is even more important when the application is deployed to the cloud and the response time plays a major role.This paper evaluates different databases and their performance. To test the databases there was an application made in the server script language PHP or Hypertext Preprocessor and it was deployed to Windows Azure cloud platform. The test applications task is to call and load databases by controlled requests which creates, reads, updates and deletes data in an relatively large extent.The results shows that locale databases or databases in the same data center as the server generates the fastest response.

Ett erkänt problem inom industrin för mjukvaruutveckling är bristen på kvalitativ systemdokumentation. Hos företaget Multisoft Consulting finns detta problem. Utvecklare måste spendera onödigt mycket tid på att sätta sig in i befintliga system. Som en del av lösningen vill företaget införa automatisk generering av dokumentation. Genereringen ska ske i plattformen Softadmin® som används för att bygga alla kundsystem.

Inledning: Epikutantester används för utredning av kontaktallergier. Det görs ca 3000 tester varje år i Sverige som överförs till ett kvalitetsregister.  Målet med projektet var att utveckla en webbapplikation och en underliggande databas för hantering och lagring av ett nationellt kvalitetsregister för epikutantester (The Swedish Patch Register). Databasen skall lagras på en central server lokaliserad på Universitetssjukhuset, Örebro.Metoder: Lösningen blev en applikation för webbläsare programmerad i språket C# med hjälp av Microsoft Visual Studio 2008 och ramverket ASP.NET 3.5. MySQL .NET connector tool 6.2.2 möjliggjorde anslutningen mellan ASP.NET och databasen.

Speedledger is a company that is working to automate electronic accounting for businesses, organizations and associations.In the current situation bank data is sent from the users internet bank to Speedledger via a virtual printer driver. The driver transforms the web page into a PDF and sends it to a server for interpretation.The problem is that PDF is not created for this sort of data transfer and makes the interpretation of data is very problematic.The goal of the thesis is to study whether there is a possibility to develop a browser add-on that can retrieve information on the customer's banking page and send it on to Speedledgers server for interpretation. My task was to implement a add-on for one of the three major browsers Mozilla Firefox, Google Chrome or Microsoft Internet Explorer, and then study the possibility of implementing it to the other two by reading the documentation.What I concluded was that it is possible to implement for all the three browsers. However, the techniques will differ slightly when developing these add-ons.  .

This report describes a bachelor thesis work performed at the cloud storage company CloudMe in Linköping, Sweden. The storage service provided by CloudMe allows users to access their files seamlessly from multiple units at the same time. In the cloud there is storage provided for contacts, calendar and e-mail, which is data nowadays normally used by smart phones.Exchange ActiveSync is a protocol developed by Microsoft which, among much more, provides functionality to synchronize the previously described data. This protocol is supported by the smart phone developers and the ability to synchronize over the exchange protocol is implemented in products by default. Due to this fact it would be preferable to implement support for synchronization from CloudMe to phones over this protocol.