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In recent decades, the number of researches on access control and user actions in computer systems has increased. Over time, there have been two models of implementing Mandatory Access Control (MAC) policies for government institutions and Discretionary Access Control (DAC) for the business environment, policies that various access control modeling solutions seek to implement. Among the access control modeling solutions developed are Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC), presented in the U.S.A. by the National Institute of Standard and Technology (NIST). In Romania, in 2010, the access control solution based on trust was presented. This paper presents Mandatory Access Control policy modeling using the trust-based access and actions control modeling solution.

The anti-counterfeiting is an ongoing problem whose solution requires significant human and financial resources. Eventual additional expenses are reflected in the final price of a protected product that means the customers pay for anti-counterfeiting. Simple and inexpensive method for document authenticity verification development and implementation, aimed to discourage documents counterfeiting in general and as a consequence guarantee authenticity of accompanying documents, bring the customer confidence in a product quality, reducing the product price. The article represents a novel method of paper document validation using modern smartphones. The proposed paper document validation method is based on paper surface structure comparison of the registered reference document and the candidate document under validation. The method allows regular owner of a smartphone to quickly validate the paper document without having any knowledge about the validation process itself. The proposed solution is characterized by high availability and scalability, which are dictated by wide popularity of smartphones and high demand for tools from this category. To achieve stable and effective work of such system the special technical design approach is required. The usage of microservice based approach for system design and implementation allows to solve mentioned problem and to allocate the hardware resources efficiently to make the system work under high load stable.

Nowadays, the majority of software systems are inherently concurrent. Anyway, internal and external concurrent activities increase the complexity of systems' behavior. Adequate architecting can significantly decrease implementation errors. This work is motivated by the desire to understand how concurrency can constrain or influence software architecting. As a result, in the paper a methodological architecting framework applied for systems with "concurrency-intensive architecture" is described. This special term is defined to emphasize architectures, in which concurrent interactions are crucial. Also in the paper potential models for each phase of architecting framework are indicated. [ABSTRACT FROM AUTHOR]