Luleå University of Technology is growing rapidly with world-leading expertise in several research areas. We shape the future through innovative education and groundbreaking research results, and based on the Arctic region, we create global social benefits. Our scientific and artistic research and education are conducted in close collaboration with international, national and regional companies, public actors and leading universities. Luleå University of Technology has a total turnover of almost SEK 2.1 billion per year. We are currently 1,900 employees and have 18,700 students. In the coming years, billions of kronor will be invested in Norrbotten and Västerbotten in major projects aimed at a more sustainable society nationally as well as globally. Luleå University of Technology is involved in several of these highly topical research projects and the social transformation that follows. We have a wide range of programs to match the skills that are in demand. We hope you will help us build the sustainable businesses and societies of the future. The Cyber Security subject at the Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology is now looking for a PhD student to contribute to our growing activities. Luleå University of Technology is in an expansive phase and is implementing an initiative to strengthen research and education in cybersecurity by establishing a new research group in the field. The initiative is directly related to the university's successful ICT environment with several strong research groups that offer good synergy opportunities. We therefore see a focus on research and development of methods to protect different types of systems connected to the internet as important. These systems range from small sensors to large-scale control systems for society's energy supply, and the research ranges from deep research at the methodological level, e.g. algorithm development, to applied research in collaboration with other groups. Subject description Cybersecurity focuses on technical security aspects and protection of systems connected to the internet and includes protection of software, data and hardware. Project description Our collaborative project, involving academia, industry and the public sector, addresses the problem that certain types of data and information and systems need to be protected for a long time to come. Encrypted information stored today can be cracked in the future with quantum computers ("Store now, decrypt later"). This poses potential threats also to technical systems such as IoT, vehicles and critical control systems that may have a long technical lifetime and operate for 10-20 years. These systems need to be protected from becoming obsolete before they are decommissioned. By studying and developing knowledge in post-quantum cryptography, existing methods against post-quantum attacks are improved, which in turn ensures that new security systems implemented today are future-proofed. Work tasks A PhD position involves both theoretical and practical work. As a PhD student, you will be trained in scientific work in the form of publishing scientific articles in journals and at national and international conferences. You will also take compulsory and optional doctoral courses. In addition, you may have the opportunity to try out the role of teacher. As a researcher, you will work as a neutral party in many contexts, providing a great opportunity to learn how to run challenging development projects. Qualifications We are looking for analytical and motivated colleagues who can carry out advanced research both independently and in collaboration with others in our research group. You should have a Master's degree in Computer Engineering or equivalent and expertise in cryptography. Several years of programming experience in Python, C/C++ and/or other programming languages is also required. Very good written and oral communication skills in English are also required, as well as a strong team spirit. For further information on specific PhD programs, please see the curricula for PhD programs in the Faculty of Engineering Most of the cybersecurity staff is currently male, so female applicants are welcome. Further information Employment as a doctoral student is limited to 4 years, teaching and other departmental duties can be added up to 20% of full time. Place of employment: Skellefteå. Intended start date: January 1, 2026 or as soon as possible For further information, please contact: Professor/Head of Department Kåre Synnes, 0920-49 1507, kare.synnes@ltu.se Professor and Head of Subject Karl Andersson, 0910-58 5364, karl.andersson@ltu.se Trade union representative: SACO-S Diana Chroneer, 0920-49 2037 diana.chroneer@ltu.se OFR-S Marika Vesterberg, 0920-49 1721 marika.vesterberg@ltu.se How to apply We prefer that you apply for the position via the application button below where you attach a cover letter, CV/resume and copies of verified diplomas. Please mark your application with the reference number below. Both the application and the diplomas must be written in Swedish or English. Deadline for applications: December 5, 2025 Reference number: 4759-2025