PhD project in Software-Defined FHE: Rethinking Homomorphic Encryption Libraries via Software-Defined Arithmetic Optimizations

Location: United Kingdom
Application Deadline: 28 February 2025
Published: 1 week ago

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Overview

Number systems underpin computing broadly by encoding how numbers are represented and how key arithmetic operations are performed, thereby determining the efficiency and applicability of fundamental arithmetic operations. Recent advances in machine learning have highlighted the benefits of optimizing number systems for specific applications. This PhD project aims to deliver similar benefits for computations on encrypted data. Fully Homomorphic Encryption (FHE) enables data to remain encrypted while supporting arithmetic computations. This enables secure and privacy-preserved machine learning (ML) on encrypted data. However, ML on encrypted data is significantly slower than on unencrypted data, indicating the need for more efficient implementations and software libraries. Recent studies indicate that data redundancy and unoptimized arithmetic in FHE libraries prevent broader FHE adoption. An innovative approach, Software-Defined Computer Arithmetic, addresses these issues through software-defined number formats and tailored arithmetic operations, promising significant improvements in FHE performance.

The goal of this project is to explore software-defined computer arithmetic and develop new numerical formats with their corresponding customized arithmetic operations tailored for homomorphic encryption. A highly efficient software library will be created to facilitate the widespread use of FHE, making it suitable for processing encrypted data in machine learning environments.

Funding Information

To be eligible for consideration for a Home DfE or EPSRC Studentship (covering tuition fees and maintenance stipend of approx. £19,237 per annum), a candidate must satisfy all the eligibility criteria based on nationality, residency and academic qualifications.

To be classed as a Home student, candidates must meet the following criteria and the associated residency requirements:

• Be a UK National,
or • Have settled status,
or • Have pre-settled status,
or • Have indefinite leave to remain or enter the UK.

Candidates from ROI may also qualify for Home student funding.

Previous PhD study MAY make you ineligible to be considered for funding.

Please note that other terms and conditions also apply.

Please note that any available PhD studentships will be allocated on a competitive basis across a number of projects currently being advertised by the School.

A small number of international awards will be available for allocation across the School. An international award is not guaranteed to be available for this project, and competition across the School for these awards will be highly competitive.

Academic Requirements:

The minimum academic requirement for admission is normally an Upper Second Class Honours degree from a UK or ROI Higher Education provider in a relevant discipline, or an equivalent qualification acceptable to the University.

Entrance requirements

Graduate
The minimum academic requirement for admission to a research degree programme is normally an Upper Second Class Honours degree from a UK or ROI HE provider, or an equivalent qualification acceptable to the University. Further information can be obtained by contacting the School.

International Students

For information on international qualification equivalents, please check the specific information for your country.

English Language Requirements

Evidence of an IELTS* score of 6.0, with not less than 5.5 in any component or equivalent qualification acceptable to the University is required (*taken within the last 2 years).

International students wishing to apply to Queen’s University Belfast (and for whom English is not their first language), must be able to demonstrate their proficiency in English in order to benefit fully from their course of study or research. Non-EEA nationals must also satisfy UK Visas and Immigration (UKVI) immigration requirements for English language for visa purposes.

For more information on English Language requirements for EEA and non-EEA nationals see: www.qub.ac.uk/EnglishLanguageReqs.

If you need to improve your English language skills before you enter this degree programme, INTO Queen’s University Belfast offers a range of English language courses. These intensive and flexible courses are designed to improve your English ability for admission to this degree.

How to Apply

Apply using our online Postgraduate Applications Portal and follow the step-by-step instructions on how to apply.

Find a supervisor

If you’re interested in a particular project, we suggest you contact the relevant academic before you apply, to introduce yourself and ask questions.

To find a potential supervisor aligned with your area of interest, or if you are unsure of who to contact, look through the staff profiles linked here.

You might be asked to provide a short outline of your proposal to help us identify potential supervisors.

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