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D.A.J. Oudejans
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3 records found
1
Master thesis
(2022)
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D.A.J. Oudejans, J.S. Rellermeyer, J.A. Pouwelse, A. Katsifodimos, Anton Zorin
Data compliance is essential for ensuring that organizations do not run afoul of data protection and privacy legislation. Geographically distributed data is an especially relevant topic because of recent developments in cross-border data protection agreements between the United States and the European Union. We introduce Qompliance, a novel system for automated data-centric compliance evaluation in cloud environments. This approach fills a gap in the research for higher-level data-centric compliance systems with a particular focus on geographically distributed data. Its declarative and extensible policy model allows for defining policies that can govern data movements across borders and is intended to be understandable without explicit knowledge of the governed data by employing a tag-based abstraction layer. The particular challenge is to automate data-centric policy compliance on data movements in a maintainable manner. Qompliance analyzes SQL-defined data movements to extract what data is being addressed and combines this information with additional attributes to match policies in a static manner. Policies can decide whether data movements are allowed and specify requirements on the query and the execution that should be enforced. We provide a qualitative comparison between our approach and related work, and we performed a performance analysis that shows that compliance evaluation can be done in seconds for large sets of policies.
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Data compliance is essential for ensuring that organizations do not run afoul of data protection and privacy legislation. Geographically distributed data is an especially relevant topic because of recent developments in cross-border data protection agreements between the United States and the European Union. We introduce Qompliance, a novel system for automated data-centric compliance evaluation in cloud environments. This approach fills a gap in the research for higher-level data-centric compliance systems with a particular focus on geographically distributed data. Its declarative and extensible policy model allows for defining policies that can govern data movements across borders and is intended to be understandable without explicit knowledge of the governed data by employing a tag-based abstraction layer. The particular challenge is to automate data-centric policy compliance on data movements in a maintainable manner. Qompliance analyzes SQL-defined data movements to extract what data is being addressed and combines this information with additional attributes to match policies in a static manner. Policies can decide whether data movements are allowed and specify requirements on the query and the execution that should be enforced. We provide a qualitative comparison between our approach and related work, and we performed a performance analysis that shows that compliance evaluation can be done in seconds for large sets of policies.
Customer Verification Engine
Automated Customer Verification for a Peer-to-Peer Lending Platform
Bachelor thesis
(2019)
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Martijn Comans, Olav de Haas, Daan Oudejans, Emiel de Smidt, Yves Candel, Maurício Aniche
There is a lot involved in providing a loan as a company, mostly in terms of legalities and risk management. As a lender it is important to have a clear record of the customers applying for a loan, as this helps assessing the risk that comes with providing a loan. Furthermore, it is required by law to know who it is that you are providing a loan to. To achieve this, loan providers gather a variety of personal and financial information. The gathering of such information has traditionally been a time consuming practice, both for the customer and the lender. The customer is required to manually find and submit information, and in turn the lender has to verify that the received information is not fraudulent or incorrect. If collection of personal information, payrolls and credits could be done in an automated way, both the customer and the lender will benefit greatly. We have designed and developed the Customer Verification Engine, the CVE, in order to solve this time consuming process of collecting and submitting documents. The CVE is capable of cleverly combining several external data sources, creating a clear record of the customer. While previously the customer had to manually provide a large set of documents, it is now done at the push of a button. Furthermore, by having a system where the information is retrieved, rather than provided by the customer, the verification becomes significantly more reliable, as there is little to no room for the customer to provide fraudulent information. The CVE is a robust and scalable system that is capable of handling unexpected behavior both in terms of input and connection to external sources. An extensive test suite verifies correct behavior of the CVE under both normal and unexpected circumstances. The information gathered by the CVE will be relied upon to determine whether or not a customer is eligible for a loan. As the CVE will be continued to be worked upon, we have put effort into making it extendable for future developers. Using the extensive documentation and the modularity of the system, it should be straightforward for future developers to add new integrations with external parties to the CVE.
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There is a lot involved in providing a loan as a company, mostly in terms of legalities and risk management. As a lender it is important to have a clear record of the customers applying for a loan, as this helps assessing the risk that comes with providing a loan. Furthermore, it is required by law to know who it is that you are providing a loan to. To achieve this, loan providers gather a variety of personal and financial information. The gathering of such information has traditionally been a time consuming practice, both for the customer and the lender. The customer is required to manually find and submit information, and in turn the lender has to verify that the received information is not fraudulent or incorrect. If collection of personal information, payrolls and credits could be done in an automated way, both the customer and the lender will benefit greatly. We have designed and developed the Customer Verification Engine, the CVE, in order to solve this time consuming process of collecting and submitting documents. The CVE is capable of cleverly combining several external data sources, creating a clear record of the customer. While previously the customer had to manually provide a large set of documents, it is now done at the push of a button. Furthermore, by having a system where the information is retrieved, rather than provided by the customer, the verification becomes significantly more reliable, as there is little to no room for the customer to provide fraudulent information. The CVE is a robust and scalable system that is capable of handling unexpected behavior both in terms of input and connection to external sources. An extensive test suite verifies correct behavior of the CVE under both normal and unexpected circumstances. The information gathered by the CVE will be relied upon to determine whether or not a customer is eligible for a loan. As the CVE will be continued to be worked upon, we have put effort into making it extendable for future developers. Using the extensive documentation and the modularity of the system, it should be straightforward for future developers to add new integrations with external parties to the CVE.
Stop Boiling the Oceans
A Review on Energy Efficient Proof of Work Alternatives
Student report
(2019)
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Martijn Comans, Olav de Haas, Ricardo Jongerius, Daan Oudejans, Emiel de Smidt, Zekeriya Erkin, Philip Zimmermann Jr
Bitcoin’s underlying consensus algorithm, Proof of Work, is of inefficient nature. Due to the sheer size that Bitcoin has grown to over the recent years, power consumption has increased so much that the Bitcoin network has been estimated to consume more power than the whole country of Ireland. This paper investigates several alternatives to the Proof of Work consensus algorithm, with a focus on energy efficiency. We found permissioned and permissionless consensus algorithms that offer solutions that consume significantly less energy than Proof of Work.
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Bitcoin’s underlying consensus algorithm, Proof of Work, is of inefficient nature. Due to the sheer size that Bitcoin has grown to over the recent years, power consumption has increased so much that the Bitcoin network has been estimated to consume more power than the whole country of Ireland. This paper investigates several alternatives to the Proof of Work consensus algorithm, with a focus on energy efficiency. We found permissioned and permissionless consensus algorithms that offer solutions that consume significantly less energy than Proof of Work.