This master thesis deals with Internet security in general and IPsec in particular. Traffic and transactions over the Internet are risky, and credit card numbers are easily stolen and abused. IPsec has been developed to ensure security and integrity and we discuss how IPsec works and where in the computer network it resides. In order [...]
With more and more widespread use of web services in building distributed applications grows and the need to develop and implement adequate mechanisms for protection of such applications. The purpose of this paper is to investigate ways for achieving high security by using encryption during development of applications providing web services. The main task of [...]
With the advancements of mobile communication technologies, the utilization of audio-visual information in addition to textual information becomes more prevalent than the past. Cryptographic approaches are therefore necessary for secure multimedia content storage and distribution over open networks such as the Internet. A traditional way to resist statistical and differential cryptanalyses is to employ permutation [...]
This thesis describes two proposed schemes that could be used to secure mobile messaging (SMS/MMS) as well as one scheme that could be used to secure mobile content. The security services we considered in securing the mobile messages are confidentiality, authentication, non-repudiation and integrity. We used Identity Based Cryptography in order to secure the mobile [...]
This master thesis has been written for the specific purpose of finding a way to store encryption keys in a secure manner. Encryption keys are used to protect valuable information. If the secrecy, integrity or availability of the keys are damaged, then the secrecy, integrity or availability of the valuable information may be damaged. In [...]
This thesis is motivated by the problem of user authentication mechanisms, i.e. the problem of associating a digital identity with a physical person for later verification. Authentication in the physical world is an old story, keys opened doors, people were recognised by the guard at the door and secret passwords let the right persons through [...]