Security Policies constitute the core of network protection infrastructures. However, their development is a sensitive task because it can be in opposition with the security requirements (e.g. lack of rule or conflicting rules). A specification task seems to be indispensible in order to clarify the desired exigencies. A validation process for security policies becomes then necessary before thei...

Among information security controls, the literature gives a central role to information security policies. However, there is a reduced number of empirical studies about the features and components of information security policies. This research aims to contribute to fill this gap. It presents a synthesis of the literature on information security policies content and it characterizes 25 City Cou...

One of the most important protocols for implementing tunnels in order to take action of secure virtual private network is IPsec protocol. IPsec policies are used widely in order to limit access to information in security gateways or firewalls. The security treatment, namely (Deny, Allow or Encrypt) is done for outbound as well as inbound traffic by security policies. It is so important that the...

IPSec [1] policies are widely deployed in firewalls or security gateways to protect information property. The security treatment (e.g. deny, allow or encrypt etc.) of all inbound or outbound traffic will be determined by the security policies, and thus it is critical for policies to be specified and configured correctly. IPSec policies are manually configured to individual security gateway in c...

This paper analyzes the most common security problems of web application level. A model WALSG (Web Application Level Security Gateway) is presented to provide web application level security. WALSG employs XML Schema to specify access control policies and security policies for HTML pages and cookies. WALSG can also be used as a secure tool to define access control policies and security policies ...

It is widely agreed that a key threat to information security is caused by careless employees who do not adhere to the information security policies of their organizations. In order to ensure that employees comply with the organization’s information security procedures, a number of information security policy compliance measures have been proposed in the past. Prior research has, however, criti...

Security policies are rules aimed at protecting the resources of an organisation from the risks associated with computer usage. Designing, implementing and maintaining security policies are all error prone and time consuming. We report on a tool that helps managing the security policies of an organisation. Security policies are formalised using first-order logic with equality and the unique nam...

The contents access and sharing in multimedia social networks (MSNs) mainly rely on access control models and mechanisms. Simple adoptions of security policies in the traditional access control model cannot effectively establish a trust relationship among parties. This paper proposed a novel two-party trust architecture (TPTA) to apply in a generic MSN scenario. According to the architecture, s...

Context-based security is an approach for modeling adaptive security solutions based on the situation of use of the system. Security policies in this approach are not static as it used to be in traditional systems. The security actions to be taken are based on the knowledge of the combination of various factors such as the location of the user, the surroundings, time, temperature etc making the...

We present a specification approach of secured systems as transition systems and security policies as constraints that guard the transitions. In this context, security properties are expressed as invariants. Then we propose an abduction algorithm to generate possible security policies for a given transition-based system. Because abduction is guided by invariants, the generated security policies...