Enka Blanchard

Enka Blanchard

Researcher (they/them)

Digitrust Consortium, Université de Lorraine


I am a postdoctoral researcher recently recruited by the Digitrust Consortium to create transdisciplinary research projects. Before this, I defended my PhD titled “Usability: low tech, high security” at IRIF in the Distributed Algorithms and Graphs Team. I was advised by Nicolas Schabanel and Ted Selker, with whom I worked on human usability of security and its applications to voting systems.

As I work between multiple fields, I do not have as much expertise as a specialist in a single field, which leads me to create collaborations with a large set of researchers and experts from different labs. It means that I am a member of multiple research groups, such as the Random Sample Voting Project, where I am responsible for the organization of RSV elections, Chôros and the POP Special Exploratory Committee, a new political party/platform where we seek to implement real-time democracy. This allows me to bridge the different fields while making sure that the methodology and end results are sound.

I am generally extremely open to new collaborations, so don’t hesitate to drop me a line if you have an idea or would like to participate in some of our projects. After a decade of activism, I also recently decided to get involved in the more academic side of queer and crip theories.

I’m currently in the process of publishing a book on the use of randomness in politics. I’m also co-organising a seminar on law and informatics at EHESS, which is on hold due to COVID-19.

Click here if you want to know a bit more about me, non-professionally.


  • Human-Computer Interactions
  • Security and Cryptography
  • Queer and Crip Theory
  • Institution Design
  • Graph Theory
  • Complexity Theory
  • Voting Theory, e-Democracy
  • History of Political Philosophy
  • Copyright on semi-public data


  • PhD in Usable Security, 2019

    Institut de Recherche en Informatique Fondamentale

  • Diplôme de l'ENS, 2016

    Ecole Normale Supérieure de Paris

  • Master of Research in Computer Science, 2015

    ENS de Paris and Paris VII University

  • BScs in Computer Science and Mathematics, 2012

    Paris VII University


Current Experiments

Please participate and help us.

Discrete Mathematics

Formalisation never hurt anyone.

Planetary Science

Better metaheuristics to map Pluto.

Voting Systems

Humans, institutions and technology.

Queer and Crip Theory

Temporalities, spatialities and intersections of identities.

Usable Security

Improving security by putting the human at the center of the system.

PhD Thesis

Usability: low tech, high security

I defended my thesis titled Usability: low tech, high security on June 21st, 2019, before the following jury (final report):

Directors: Nicolas Schabanel and Ted Selker;

Reviewers: Michelle Mazurek (report), David Naccache (report), Peter Y. A. Ryan (report);

Examiners: Adrian Kosowski and Marine Minier (president of the jury).

Main Publications

Full list, Note on authorship

(2020). Cue-Pin-Select, a Secure and Usable Offline Password Scheme.


(2020). Discreet crips in a discrete world: spatialities and temporalities of disability. Accepted at espaces-temps.net.


(2020). Origami voting: a non-cryptographic approach to transparent ballot verification. 5th Workshop on Advances in Secure Electronic Voting – VOTING’20.


(2020). Towards an Empirical Cost Model for Mental Password Algorithms. Accepted at CHI ‘20 Extended Abstracts on Human Factors in Computing Systems.


(2019). Consonant-Vowel-Consonants for Error-Free Code Entry. HCI for Cybersecurity, Privacy and Trust - First International Conference, HCI-CPT 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26-31, 2019, Proceedings.

PDF Slides DOI

(2018). Improving security and usability of passphrases with guided word choice. Proceedings of the 34th Annual Computer Security Applications Conference, ACSAC 2018, San Juan, PR, USA, December 03-07, 2018.

PDF Slides DOI

Teaching and Popularisation

Popularisation articles

In Tangente and CIJM.

Talks and posters

In schools and Worldcon


Mostly at EIDD and with Animath.