Project Summary: 

A digital credential is a signature issued by an issuer on a set of attributes, e.g. name, age, date-of-birth, etc. To access a service associated with access policies, a user can convince a verifier that her attributes satisfy the access policies by showing her credential. However, the user will release all her attributes included in the credential to the verifier and the verifier can use the credential to authenticate on behalf of the user.  Anonymous credential allows a user to obtain a credential from an issuer to certify her attributes and convince a verifier that her attributes satisfy the access policies without showing it directly.  Anonymous credential has two advantages: (1) a user can control release her attributes; (2) a verifier cannot reuse an anonymous credential even if he has checked its correctness. Anonymous credential has been used into various application systems to protect users’ privacy and implement flexible authentication. Announced in 2018, the General Data Protection Regulation (GDPR) is a regulation to give control to individuals on their personal data. Anonymous credential is an elegant building block to implement and enforce GDPR since it allows users to control release their personal information.

Quantum computer is coming and will change lives, society and economics. Current anonymous credential schemes whose security are reduced to well-known hard problems, e.g. the discrete logarithm problem, the integer factorization problem or the elliptic-curve discrete logarithm problem are not secure against an attack by a quantum computer. Hence, it is very interesting and challenging to design quantum resistant anonymous credential schemes to protect users’ privacy and implement anonymous authentication in quantum systems.


 The objectives of this research are:

  • To study the state of the art in anonymous credential and lattice-based signature;
  • To design new lattice-based anonymous credential schemes;
  • To apply lattice-based anonymous credential into access control schemes;
  • To investigate the implementation of lattice-based anonymous credential.

Academic Requirements:

Students entering the programme will normally be required to have a 2.1 BSc/BEng in Computer Science, Electrical and Electronic Engineering, or a maths based engineering or physical science degree, or equivalent qualification recognised by the University. Students holding an appropriate MEng or MSc (Software conversion) will normally be required to have a 2.1 or commendation (distinction) respectively. Furthermore, additional criteria may be applied. All applicants must have significant mathematical and programming experience.

General Information: 

This 4 year PhD studentship, potentially funded by the Department for Employment and Learning (DEL), commences on 1 October 2019.

Eligibility for both fees and maintenance depends on the applicants being either an ordinary UK resident or those EU residents who have lived permanently in the UK for the 3 years immediately preceding the start of the studentship. Non UK residents who hold EU residency may also apply but if successful may receive fees only.

Applicants should apply electronically through the Queen’s online application portal at:

Further information available at:


Contact Details:

Supervisor Name: Dr Jinguang Han                                                        

Tel: +44 (0)28 9097 1819                                                                            



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