Where do I work?

 I am currently a Cryptography Researcher at Optalysys. I am a final year part-time PhD student in the Information Security Group at Royal Holloway, University of London. My research is in lattice-based post-quantum cryptography, and I specialise in Fully Homomorphic Encryption (FHE). 

I am also a guest teacher in the Mathematics department at LSE, previously in-person and now online.

Prior to my current role I was a postdoctoral research fellow at the University of Edinburgh, supervised by Michele Ciampi.

During autumn 2022, I completed a policy internship at UKHSA, funded by UKRI. 

I completed an MSc in Mathematics and Foundations of Cryptography at the University of Oxford and a BSc in Mathematics at the University of Manchester.

Publish or perish? Let's do both!

• Designs for practical SHE schemes based on Ring-LWR.
  M. Bolboceanu, A. Costache, E. Hales, R. Player, G.M. Rosca, R. Titiu. Communications in Cryptology, Volume 2, Edition 1.
  [paper] [presentation1] [presentation2]

• Security Guidelines for Implementing Homomorphic Encryption.
  R. Cammarota, J.H. Cheon, I. Chillotti, B.R. Curtis, W. Dai, H. Gong, E. Hales, D. Kim, B. Kumara, C. Lee, X. Lu, C. Maple, A. Pedrouzo-Ulloa, R. Player, L.A. Ruiz Lopez, Y. Song, D. Yhee, B. Yildiz. Communications in Cryptology, Volume 1, Edition 4.
  [paper] [presentation]

• On the precision loss in approximate homomorphic encryption.
  A. Costache, B. Curtis, E. Hales, S. Murphy, T. Ogilvie, R. Player, SAC 2023
  [paper] [fortunately no digital record of me presenting this work exists]

The fun stuff

I have been fortunate to co-organise the events Decrypting Diversity Summit 2025, Crossfyre 2023, and Workshop on Foundations and Applications of Lattice-based Cryptography 2022.