Please answer your questions in the order specified. Write legibly, and use proper sentences; an unreadable answer is a wrong answer. . . Answer questions concisely, but with sufficient detail and precision. Always explain your answers. Please leave space in the margin for correction marks. Use a separate piece of scratch paper for draft answers, private computations or remarks. You are not all...

The book gives an extensive overview of network security and the necessary cryptography. It covers standards and protocols in great detail, and can serve as a handy reference for people interested in this area. Due to the many exercises, it can also serve as one of the textbooks of an introductory course on network security. 1 What the book is about The book is intended as a textbook for a one-...

Network Security Scanner (NSS) is a tool that allows auditing and monitoring remote network computers for possible vulnerabilities, checks your network for all potential methods that a hacker might use to attack it. Network Security Scanner is a complete networking utilities package that includes a wide range of tools for network security auditing, vulnerability Auditing, scanning, monitoring a...

Viruses, Worms and Trojan Horses, the malware zoo is growing every day. Hackers and Crackers try to penetrate computer systems, either for fun or for commercial benefit. Zombie-like creatures called Bots attack in the 10’s of thousands. Computer intrusions cause monetary as well as prestige losses. Countermeasures surely have to be taken, so a look on current technology and future outlines seem...

Every organization chooses a virtual private network (VPN) as their top option since it is practical and secure solution. Through the use of network, this study seeks to evaluate in SMK (VPN). The descriptive qualitative research used was carried out at lab Negeri 1 Ampek Angkek. Data were gathered through observation, interviews, document analysis studies. method data employed analysis. result...

The approach to network security analysis is suggested. It is based on simulation of malefactor’s behavior, generating attack graph and calculating different security metrics. The graph represents all possible attack scenarios taking into account network configuration, security policy, malefactor’s location, knowledge level and strategy. The security metrics describe computer network security a...

Current social network systems support a large range of applications with very different security requirements. Even if available social network solutions provide some security functionalities, users do not control these functionalities and cannot customize them to handle their specific security needs. In this paper, we suggest a new approach to handle these issues. This approach is based on As...

We present a unified theory for verifying network security policies. A security policy is represented as directed graph. To check high-level security goals, security invariants over the policy are expressed. We cover monotonic security invariants, i.e. prohibiting more does not harm security. We provide the following contributions for the security invariant theory. (i) Secure auto-completion of...

As an important method to analyze the security states of computer network, the generation of network attack graph is a hot topic in this domain. After analyzing network vulnerabilities, linking relation between devices and the characteristic of attack, the model of network security states is built, and the generating algorithm of attack graph is implemented. The experiment validates the prototy...