My little place in the Web :)

Hi, im Pascal Stehling, an Data Engineer & Data Architect living in Potsdam (suburb of Berlin, Germany). If you want to know more about me: here you can find a short CV or a longer About section .

Im really bad at Web-Design, so big thanks to Astro Micro Academics for making it possible to have this small, good looking place in the Web :)

Let's Connect

If you want to get in touch with me about something or just to say hi, send me an email :)

IT Interests

- Data Engineering
- Data Science & AI
- Post-Quantum & Homomorphic Encryption

Stuff I do outside of IT

- Swing Dancing (Lindy Hop & Charleston)
- Trying sew classical menswear around 1920s
- and interest in nearly all natural science & technical development

My own publications

See all research

Homomorphic Post-Quantum Cryptography - Evaluation of Module Learning with Error in Homomorphic Cryptography

Pascal Stehling

Thesis Code Web

via Hochschule Wismar

This thesis investigates the conversion of Ring-LWE (R-LWE)-based homomorphic encryption schemes to Module-LWE (M-LWE) and analyses the resulting perfor- mance differences. The advantage of M-LWE is that a fixed-sized polynomial de- gree can be utilized and the security of the system can be changed by increas- ing the vector/matrix dimension. This is the same concept that is utilized in the CRYSTALS-Kyber encryption scheme. The feasibility of transferring R-LWE to M- LWE is demonstrated based on the BFV homomorphic encryption scheme, showing that a functioning homomorphic encryption can be maintained. While the addition is straightforward, the multiplication necessitates the generation of multiple relin- earization (evaluation) keys. It is demonstrated that the practical performance is only slightly inferior to that of R-LWE, with the advantage of smaller ciphertext sizes. However, there is still considerable scope for improvement in theoretical as- pects, such as the study of security benefits and in practice, in enhancing the general performance.