‘Enhanced Encryption and Fine-Grained Authorization for Database Systems

The aim of this research is to enhance fine-grained authorization and encryption so that database systems are equipped with the controls necessary to help enterprises adhere to zero-trust security more effectively. For fine-grained authorization, this thesis has extended database systems with three new concepts: Row permissions, column masks and trusted contexts. Row permissions and column masks provide data-centric security so the security policy cannot be bypassed as with database views, for example. They also coexist in harmony with the rest of the database core tenets so that enterprises are not forced to compromise neither security nor database functionality. Trusted contexts provide applications in multitiered environments with a secure and controlled manner to propagate user identities to the database and therefore enable such applications to delegate the security policy to the database system where it is enforced more effectively. Trusted contexts also protect against application bypass so the application credentials cannot be abused to make database changes outside the scope of the application’s business logic. For encryption, this thesis has introduced a holistic database encryption solution to address the limitations of traditional database encryption methods. It too coexists in harmony with the rest of the database core tenets so that enterprises are not forced to choose between security and performance as with column encryption, for example. Lastly, row permissions, column masks, trusted contexts and holistic database encryption have all been implemented IBM DB2, where they are relied upon by thousands of organizations from around the world to protect critical data and adhere to zero-trust security more effectively

A comprehensive meta-analysis of cryptographic security mechanisms for cloud computing

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.The concept of cloud computing offers measurable computational or information resources as a service over the Internet. The major motivation behind the cloud setup is economic benefits, because it assures the reduction in expenditure for operational and infrastructural purposes. To transform it into a reality there are some impediments and hurdles which are required to be tackled, most profound of which are security, privacy and reliability issues. As the user data is revealed to the cloud, it departs the protection-sphere of the data owner. However, this brings partly new security and privacy concerns. This work focuses on these issues related to various cloud services and deployment models by spotlighting their major challenges. While the classical cryptography is an ancient discipline, modern cryptography, which has been mostly developed in the last few decades, is the subject of study which needs to be implemented so as to ensure strong security and privacy mechanisms in today’s real-world scenarios. The technological solutions, short and long term research goals of the cloud security will be described and addressed using various classical cryptographic mechanisms as well as modern ones. This work explores the new directions in cloud computing security, while highlighting the correct selection of these fundamental technologies from cryptographic point of view

Oracle warehouse management system-security enhancements

Estágio realizado na Wipro Retail e orientado pelo Doutora Ana Paula Barroso OliveiraTese de mestrado integrado. Engenharia Informática e Computação. Faculdade de Engenharia. Universidade do Porto. 200

Development of Incident Response Playbooks and Runbooks for Amazon Web Services Ransomware Scenarios

In today’s digital landscape, enterprises encounter myriad cybersecurity challenges that jeopardize their critical digital assets. Modern cyber threats have evolved drastically, adapting to the proliferation of cloud technologies that drive organizations towards platforms like AWS that offer convenience, cost-reduction, and reliability. However, this transition introduces new security risks because threat actors are motivated to craft and deploy advanced malware explicitly targeting the cloud. Ransomware emerged as one of the most impactful and dangerous cyber threats, still in 2023, encrypting data and demanding payment (usually in untraceable tokens) for the decryption key. Confidentiality, integrity, and availability of cloud assets stand perpetually vulnerable, and sometimes, unprepared businesses suddenly hit by ransomware cannot find a way out. Besides financial loss and operation disruption, the breach of sensitive information compromises trust, leading to reputational damage that's hard to mend. Corporations are urged to develop robust defensive strategies to identify, contain, and recover from ransomware and other cloud threat exploitation. Traditional cybersecurity approaches must rapidly reshape to manage emerging menaces. Hence, they require new specialized and well-structured incident response plans to become the bedrock of the security tactics. This thesis dives into the complexities of designing and implementing accurate incident response Playbooks and Runbooks, focusing on handling the common danger of ransomware, especially within Amazon Web Services (AWS). This research journey is strictly connected to the real-world context, resulting from a six-month internship within Bynder, a digital asset management leader company. This experience culminated in conceptualizing the step-by-step procedures against ransomware incidents in cloud infrastructures, improving communication, and coordinating actions during high-pressure situations

Big Data Security (Volume 3)

After a short description of the key concepts of big data the book explores on the secrecy and security threats posed especially by cloud based data storage. It delivers conceptual frameworks and models along with case studies of recent technology