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Nikolai Stoianov

Publications and source records attributed to Nikolai Stoianov.

7 recordsLinked to original sources
arXiv2026

ACTING: A Platform for Cyber Ranges Federation

Cyber Defence (CD) training requires interoperable cyber-range environments capable of supporting complex, multidomain exercises across distributed infrastructures. This paper presents three main contributions addressing this challenge. First, we introduce the Exercise Description Language - First Generation (EDL-FG), a structured language for formally describing cyber-range training services and exercises. EDL-FG captures both the technical infrastructure required to emulate ICT/OT environments and the scenario logic governing cyber events, injects, and participant interactions, enabling interoperable and automated scenario deployment across federated Cyber Ranges (CRs). Second, the ACTING platform introduces automated PE and scoring mechanisms that assess trainee actions during exercises through coordinated data collection and analysis across participating CRs. Third, the platform enables multi-domain cyber training scenarios that combine civilian and military operational contexts. Building upon federation capabilities established under the H2020 ECHO project, ACTING demonstrates how interoperable scenario description and automated evaluation support scalable and realistic CD training.

cs.CR↗
arXiv2016

Assessing Mission Impact of Cyberattacks: Report of the NATO IST-128 Workshop

This report presents the results of a workshop conducted by the North Atlantic Treaty Organization (NATO) Information Systems Technology (IST) Panel in Istanbul, Turkey, in June 2015 to explore science and technology for characterizing the impact of cyber-attacks on missions. Military mission success is highly dependent on the communications and information systems (CISs) that support the mission and their use in the cyber battlespace. The inexorably growing dependency on computational information processing for weapons, intelligence, communication, and logistics systems continues to increase the vulnerability of missions to various cyber threats. Attacks on CISs or other cyber incidents degrade or disrupt the usage of CISs, and the resulting mission capability, performance, and completion. These incidents are expected to increase in frequency and sophistication. The workshop participants concluded that the key to solving the mission impact assessment problem was in adopting and developing a new model-driven paradigm that creates and validates mechanisms of modeling the mission organization, the mission(s), and the cyber-vulnerable systems that support the mission(s). Such models then simulate or portray the impacts of the cyber-attacks. In addition, such model-based analysis could explore multiple alternative mitigation and work-around strategies - an essential part of coping with mission impact - and select the optimal course of mitigating actions. Only such a paradigm can be expected to provide meaningful, actionable information about mission impacts that have not been seen before or do not match prior experiences and patterns. The papers presented at this workshop are available in an accompanying volume, Proceedings of the NATO Workshop IST-128, Assessing Mission Impact of Cyber Attacks.

cs.CR↗
arXiv2010

A Protection Approach for Video Information transmitted in TCP/IP based networks

In this paper an analysis of the existing video information protection methods is made. Analysis of current H.323 protocol stack has been made. A new encryption/decryption layer has been suggested. An approach for partial data encryption in the H.323 protocol stack is proposed and sample architecture of a Virtual Private Video Network is given.

cs.CR↗
arXiv2010

One software tool for testing square s-boxes

An encryption technique is widely used to keep data confidential. Most of the block symmetric algorithms use substitution functions. Often this functions use so called S-BOX matrix. In this paper author presents one software tool for testing and measuring square s-boxes. Based of information theory functions for testing static and dynamic criteria are presented. These criteria are mathematically defined for square s-boxes. Two new criteria "private criteria" a proposed and pseudo codes for they creation and testing are presented.

cs.CR↗
arXiv2010

INDECT Advanced Security Requirements

This paper reviews the requirements for the security mechanisms that are currently being developed in the framework of the European research project INDECT. An overview of features for integrated technologies such as Virtual Private Networks (VPNs), Cryptographic Algorithms, Quantum Cryptography, Federated ID Management and Secure Mobile Ad-hoc networking are described together with their expected use in INDECT.

cs.CR↗
arXiv2010

The E-net model for the Risk Analysis and Assessment System for the Information Security of Communication and Information Systems ("Defining" Subsystem)

This paper presents one suggestion that comprises the authors' experience in development and implementation of systems for information security in the Automated Information Systems of the Bulgarian Armed Forces. The architecture of risk analysis and assessment system for the communication and information system's information security (CIS IS) has been presented. E-net model of "Defining" Subsystem as a tool that allows to examine the subsystems is proposed as well. Such approach can be applied successfully for communication and information systems in the business field.

cs.CR↗