Cookies are unique identifiers, usually made up of short lines of text or code. Generally, cookies are stored on your terminal or in your browser and send certain determined information to the site which transmitted the cookie. When we talk about cookies, we are really referring to a wider range of technologies, including web beacon, clear gifs, pixel and other similar technologies. When we speak of first-party cookies, we mean the cookies transmitted by When we talk about third-party cookies, we mean cookies transmitted by third-party subjects outside

Typologies of cookies

Depending on the characteristics and use of cookies, it is possible to distinguish different categories:

  • Strictly necessary cookies.

These are cookies that are essential for the proper functioning of the sites and are used to manage the identification (login) and access to the reserved functions of the site. The duration of cookies is strictly limited to the working session (when the browser is closed, they are deleted) with the exception of certain pages of the efrome site where cookies with a longer duration are used (with a 30-day expiry date), allowing, during this limited period, to be able to recognize the visitor's computer - through an alphanumeric code generated during the first access session - so as to offer him the result of the test carried out by the user. Their deactivation compromises the use of services accessible by "login". The public part of efrome sites functions normally.

  • Analysis and service cookies.

These are cookies used to collect and analyze traffic and site usage anonymously. These cookies, without identifying the user, for example make it possible to see whether the same user returns to visit the site at different times. They also make it possible to monitor the system and improve its performance and usability. The deactivation of these cookies can be done without any loss of functionality.

  • Profiling cookies.

These are permanent cookies used to identify (anonymously or not) user preferences and improve their browsing experience.

Use of Cookies

Cookies are used to better understand how apps and websites work and to optimize online and mobile experiences. Cookies do this by allowing the party transmitting the cookie to analyze the performance of a website or a mobile application, to identify certain users anonymously and to remember their preferences, to better understand whether a computer or terminal (and probably its user) has already visited a website and provide personalized advertising.

Third-party cookies

By visiting a website, it is possible to receive cookies both from the site visited ("owners"), and from sites managed by other organizations ("third parties"). A good example of the latter case is the presence of "social plugins" (or social modules) for Facebook, Twitter, Google+ and LinkedIn. These are elements of the visited page generated directly by the sites cited and integrated into the home site page. The most common use of social plugins is to allow content to be shared on social networks.

The presence of these modules involves the transmission of cookies to and from all sites managed by third parties. The management of information collected by "third parties" is described in their mandatory information notes (legal notices or charter) which it is advisable to consult. To ensure greater transparency and for ease of use, the internet addresses of the various information notices and methods of managing cookies can be found below.

Disabling cookies

You can avoid certain cookies by configuring your browser settings or by directly disabling the part that manages and controls cookies. Check your browser settings for more information. Disabling cookies could prevent some features of this site from working properly.
For detailed information on the necessary procedure, it is possible to consult the browser guide. For an overview of the most popular browsers, go to
Advertising companies also allow you to opt out of receiving targeted ads, if you wish. This does not prevent the installation of cookies, but suspends the use and collection of certain information by these companies. For more information, in particular on deactivation possibilities, go to

Types of cookies used on the site

This site uses Google Analytics, a web analysis service provided by Google Inc. ("Google"). Google Analytics uses cookies, which are text files placed on your computer, to help the website analyze how users use the site. The data generated by the cookies concerning your use of the site (including your IP address) will be transmitted and stored by Google on servers located in the United States. Google will use this information for the purpose of evaluating your use of the site, compiling reports on site activity for its publisher and providing other services relating to site activity and the use of the site. Google may communicate this data to third parties in the event of a legal obligation or when these third parties process this data on behalf of Google, including in particular the publisher of this site. Google will not match your IP address with any other data held by Google. You can deactivate the use of cookies by selecting the appropriate settings on your browser. However, such deactivation could prevent the use of certain features of this site. By using this website, you expressly consent to the processing of your personal data by Google under the conditions and for the purposes described above.
It is possible to prevent Google from viewing a cookie generated by your use of this website and linked to it (including your IP address), and from using this data. To do so, download and install this browser add-on:


Page translated from French, 2021/23/07