Innovative cryptographic approaches to computer systems security

type:Thesis

Advanced information security aspects concern the protection and encryption of secure, strategic and important information. These scientific problems and practical solutions are rooted in cryptography, which uses algorithms and protocols for ensuring information confidentiality and information splitting techniques, as well methods of reconstructing information.Innovative approaches allow to guarantee that information security focuses around data splitting and sharing techniques as well as data reconstruction. Such algorithms dedicated to information sharing are called threshold schemes.The main idea of this thesis is to propose such techniques, which allow to create new models of systems security, dedicated to the management of shared strategic information. Special emphasis will be put on multi-level threshold schemes. What characterises such a division is the possibility of reconstructing information from sets containing various numbers of parts (shares) obtained from the divided secret information. This problem has not been fully elaborated yet, but it seems extremely important from the perspective of the future development of modern systems security.Hence in this thesis its Author will discuss the development of threshold schemes for information sharing and will demonstrate the possibility and the reasons behind using them to manage secret information in different structures and levels. These algorithms will be proposed by the Author of this dissertation and, after theoretical evaluation, will be described step by step.

The Author will propose new methods of information splitting, based on new threshold schemes used for secure/strategic/important information division, using mathematical linguistic formalisms. Such procedures will be described as linguistic threshold schemes. Mathematical linguistic techniques can be used in information splitting procedures and for the development new algorithms for securing data, using these techniques. Moreover, another class of threshold schemes, called biometric threshold schemes, will be proposed. Such schemes can use selected personal or individual data to mark secret parts, split secret information and to restore the original data.The basis of these proposed innovative approaches to cyber-systems security are new protocols, which use linguistic and biometric threshold schemes.The main solution of the proposed algorithms is the creation of a new generation of computer and cyber-systems by means of applying new classes of security protocols, as described in this thesis.In addition, an attempt will be dame to define new methods that could extend the current knowledge and practical solutions and which can contribute to improving the decision-making processes by means of acquisition, storage and retrieval of secret information in different organisations and at knowledge levels.The interdisciplinary nature of the proposed solutions create the subject of security systems, which constitutes part of cryptography and informatics, being a new challenge for the research and applications.