Legal notice and Privacy Policy


DATA Team at École Normale Supérieure 45 rue d'Ulm, 75005 Paris


École Normale Supérieure 45 rue d'Ulm, 75005 Paris


École Normale Supérieure and Challenge Providers (as defined in Terms of Use)


This website only uses login cookies to remember your login information and recognize you when you return to the website, and then facilitate your navigation on the website. No other cookies information are collected by the Editor or any third parties and no tracking cookies are used.


As mentioned in the Terms of Use, the mandatory personal data required to create an account on this website is strictly limited to what is necessary to ensure the proper functioning of the website. Optional additional personal information may be added at the sole discretion of users of the site on their account. This information is stored on the website as long as such account exists. This website has strictly an educational purpose. As a consequence, no personal data is in any way or whatsoever shared or transmitted to any third party, for commercial purposes or not. In accordance with the law No 78-17 of 6 January 1978 on information technology, data files and civil liberties as amended (Loi “Informatique et Libertés”), as amended, and European Regulation No 2016/679/EU of 27 April 2016 (the “General Data Protection Regulation” or “GDPR”), you have the right to access, rectify, carry and delete any online personal data on this site. To exercise this right, you can send an email to the Editor and Webmaster at: or use the Contact form.