University of Twente Student Theses


Secure Identity Management on the Blockchain

Nyante, K.A. (2018) Secure Identity Management on the Blockchain.

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Abstract:Traditional Identity Management solutions delegate trusted centralized authorities or multiple centralized agencies, tasking them with securely storing the information of users and providing these users with identity tokens such as ID cards, certificates, login credentials, hardware, etc.. With these identity tokens, users can uniquely access resources and services from the respective service providers. Although this approach is great for compliance agencies, it results in four main classes of problems namely: Individual user problems, Information sharing problems, governmental information coordination problems, and user Privacy problems. These problems are particularly conspicuous in the banking sector when it comes to Know-Your-Customer Processes (KYC). It is expensive and time consuming to generate trust between a user and a bank. At the same time, the background checks necessary for trust generation have created severe privacy issues (GDPR) that need to be addressed. Although blockchain provides high anonymity, some use cases that require strong authentication and governmental oversight. Therefore this paper outlines a new of way of conceptualizing identity management as a trust generation process and, thus, formally defines the necessary cryptographic primitives (claims and trust), Identity Management schemes, and self-sovereignty. It finally introduces a hybrid solution (blockchain gateway + blockchain framework) with the supporting security proofs.
Item Type:Essay (Master)
E-Group, Budapest, Hungary
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Computer Science MSc (60300)
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