computer security

The computer security community of today can be compared to the American Wild West once upon a time; no real law and order and a lot of new citizens. The terms and classification schemes used in the computer security field today are not standardised. Thus the field is hard to take in, there is a risk of misunderstandings, and there is a risk that the scientific work is being hampered.Therefore this report presents a proposal for a taxonomy of software ...

Hundreds of millions of people use their home computers every day for different purposes. Many of them are connected to the Internet. Most of them are unaware of the threats or do not know how to protect themselves. This unawareness is a major threat to global computer security. This master thesis starts by explaining some security related terms that might be unknown to the reader. It then goes on by addressing security vulnerabilities and flaws in the most popular home ...

As the Internet becomes the major information infrastructure in most sectors, the importance of Information Systems (IS) security steadily increases. While reaching a certain level of actual IS security is vital for most businesses, this level must also be perceived as acceptable by stakeholders. Businesses have to maintain a certain level of security and be able to assess the level of other actors’ security. IS security is abstract and complex, however, and difficult to estimate and measure. This thesis uses ...

With the increasing use of extensive IT systems for sensitive or safety-critical applications, the matter of IT security is becoming more important. In order to be able to make sensible decisions about security there is a need for measures and metrics for computer security. There currently exist no established methods to assess the security of information systems.This thesis presents a method for assessing the security of computer systems. The basis of the method is that security relevant characteristics of components ...

The evaluation and learning of classifiers is of particular importance in several computer security applications such as intrusion detection systems (IDSs), spam filters, and watermarking of documents for fingerprinting or traitor tracing. There are however relevant considerations that are sometimes ignored by researchers that apply machine learning techniques for security related problems. In this work we identify and work on two problems that seem prevalent in security-related applications. The first problem is the usually large class imbalance between normal events ...