News
Breaking Post Quantum Cryptos for Future Internet Security
Published: 2021-01-14
The communication on the internet has to be encrypted if you want to be sure that only the sender and receiver can share the information. Today's encryption is based on mathematical problems that are easy to construct but really difficult to solve....
Doctoral dissertation for download
Register for online participation at the PhD Defence 22 January at 9.15
When you shop online, contact your internet bank or use chat apps, you want to encrypt your data to avoid leaking sensitive information. Encryption as it is used today relies on the assumption that it is hard for computers to factor* large integers and some other similar problems. Despite decades of research no one has been able to efficiently solve these problems on a classical computer.
?On a quantum computer, with enough so called qubits, these problems are quite easy to solve. To prepare for a potential future where today?s encryption is broken, other mathematical problems to base encryption on are studied. This area of study is called post-quantum cryptography?, Erik Mårtensson says.
?I develop algorithms to solve the mathematical problems in post-quantum cryptography as efficiently as possible. In other words, I do cryptanalysis. We can only trust post-quantum encryption methods if considerable efforts at breaking these methods have been made.?
What made you want to pursue a PhD?
?I like math and I like thinking about hard problems. Pursuing a PhD in my area means that I can get payed to do so!?
What?s beautiful about cryptanalysis?
?In many other research areas, a mathematical problem is an approximation of reality. In my research, the mathematical problems I try to solve are constructed precisely, they are not an approximation.?
?Another beautiful aspect of the problems I study is that they are very simple to state and understand, but still very hard to solve. No matter how smart you are and no matter how much computational resources you have access to.?
How will the results come to use?
?When implementing post-quantum encryption schemes in the future, one needs to take into consideration all possible methods for trying to break the schemes, including the methods developed in my research?, Erik Mårtensson concludes.
What are your plans?
?I?m currently applying for a post-doc position.?
Link to the article Breaking Post Quantum Cryptos for Future Internet Security
ELLIIT Nyhetsblad 19 - December 2020
Published: 2020-12-20
Rubriker
Ny ELLIIT-organisationNya ELLIIT-projekt och rekryteringarResearch highlightsELLIIT i kampen mot coronaAvoiding collision when the road friction is unknownNew high-speed energy-efficient data convertersOpenModelica NewsMathematical...
Rubriker
- Ny ELLIIT-organisation
- Nya ELLIIT-projekt och rekryteringar
- Research highlights
- ELLIIT i kampen mot corona
- Avoiding collision when the road friction is unknown
- New high-speed energy-efficient data converters
- OpenModelica News
- Mathematical modelling to investigate drug effects
- Advances in malware analysis techniques
- Invited Talks
- Awards and Appointments
- Testing systems in the presence of adaptation
- Program chairs and Editorships
- PhD theses
- Organized conferences and workshops
- Personnel
- Research Grants
- Courses, outreach
- Komprimerad robotvecka
- Skolprogrammering med miljödata
Link to the article ELLIIT Nyhetsblad 19 - December 2020
Anders J Johansson - Big Science Sweden Influencer
Published: 2020-12-17
Anders J Johansson, Department of Electrical and Information Technology, LTH, Lund university has been given the Big Science Sweden Influencer Award in the university category.
Motivation: With enthusiasm and determination, Anders J...
Link to the article Anders J Johansson - Big Science Sweden Influencer
Designing AD-converter circuits in CMOS for base stations
Published: 2020-12-14
The emerging 5G network enables reliable connections with significantly reduced latency at an increased transmission rate. The increase in performance requires improvements in all parts of the communication chain. Siyu Tan?s PhD Thesis focuses on...
The thesis will be defended on 18 December 2020
The thesis for download [PDF, portal.research.lu.se].
The advancement of wireless communication systems requires high-performance Analog to Digital Converters (ADC), an essential component in a modern high-performance radio transceiver device. The main focus of Siyu Tan?s research is designing high-performance ADCs on integrated circuits. This research analyzes various ADC architectures and their component-level implementations in advanced CMOS technologies and aims to find optimized high-speed analog-to-digital conversion designs. This research tries to understand the benefits and limitations of specific ADC designs and evaluate the possibilities of integrating them inside the advanced base station devices in the future.
From fixing electronics to designing high-performance AD-converters
When Siyu Tan was a child, he enjoyed collecting non-functioning electronic devices from his friends and trying to fix them. He began to understand what components are used inside a radio, why they are designed like that, and what is the magic behind modulation, demodulation, etc. ?After I grew up, I feel more and more interested in electronic design. Instead of learning the existing circuits, I tried to build my own circuits based on the knowledge and experiences I acquired. Thanks to the growth of the Internet, it became easier for me to understand the challenging circuits by surfing online. It is truly an unforgettable experience,? he says. ?I completed my Master?s study at Lund University, which was a wise choice I made. I?ve learned a lot and gained a huge amount of supports from professors and my supervisors, who have been very knowledgable and patient whenever I?ve faced a challenge. I hope my research outcomes will create a small contribution to the state-of-the-art science world.?After you have measured the chip, you will know if your idea works
Siyu explains that the chip circuit design usually takes a very long time from the design phase to the actual measurement. Unlike the circuit-board level design, the internals of a chip is hard to see, and any problems inside the chip become difficult to debug. Therefore, it requires extensive knowledge of circuits and expertise in practices. ?In my opinion, the whole process from a CMOS circuit design to chip measurement is the most exciting part of this research work, which is also the main topic of my thesis. As a main designer, I am in charge of designing the circuit using computer-aided design (CAD) tools and preparing the chip measurement. I have to carefully think about what to design, why it is beneficial, and its performance compared with the current designs,? he says. ?Various of small circuit blocks are internally connected in a large circuit and system. Sometimes, a few adjustments here and there make huge differences to the results. The measurements are also challenging. Even though the designer already simulated the circuits extensively before the chip manufacturing, there could still be uncertainties in the actual chip measurements. Will the chip to be tested meet the target specifications? Is it sensitive to the fabrication process, supply voltage, and operating temperature? We will know the answers in the lab.?Industrial collaborations
?My project is highly related to the industry. I already got the chance to work in Ericsson Research in Lund, together with experienced researchers, to design ADC chips planned to be used in current 5G or even future 6G communication devices,? Siyu says. ?I learned a great amount of knowledge of the standard circuit design procedures from the industry, and I also got a chance to use a well-equipped lab to measure one of the prototype ADC chips. The experiences I acquired from the industry inspired me during my PhD studies, and also changed my way of thinking for my current and future works.? ?An improved chip I designed is based on an earlier prototype ADC chip designed by experienced researchers in Ericsson Research in Lund, which has been fabricated but not yet measured. This new ADC chip was designed based on industry guidelines, which could be a prototype to be integrated into high-performance communication devices in the future.?What are your plans?
?I plan to continue my research career at the EIT-department at Lund University. I will join a joint research work between Ericsson Research in Lund, and the university. The main goal is to improve my current ADC design further and achieve a higher performance than the current design. I will measure the earlier fabricated chip as soon as possible, then learn from the results and improve the design by adding or replacing a few crucial blocks for a satisfying result,? Siyu concludes.Link to the article Designing AD-converter circuits in CMOS for base stations
Harsh Tataria tilldelas 2020 års Göran Linds pris i tillämpad elektronik
Published: 2020-12-07
Harsh Tataria, biträdande universitetslektor i kommunikationsteknologi, Lunds universitet, tilldelas 2020 års Göran Linds pris i tillämpad elektronik.
Link to the article Harsh Tataria tilldelas 2020 års Göran Linds pris i tillämpad elektronik
