E-CORRIDOR Exploitation Workshop @ IMC22

E-CORRIDOR Exploitation Workshop @ IMC22

Consortium members from the E-CORRIDOR project gathered at the International Mobility Conference on October 25th & 26th in the picturesque seaside town of Sitges, Spain. Members actively contributed to two days of intense discussion around all aspects of the project, chaired by Dr. Fabio Martinelli, (CNR) and hosted graciously by local members FATCUAL and AMTU.

IMC 22

The conference, organised by the Association of Municipalities for Mobility and Urban Transport (AMTU), the Autoritat del Transport Metropolità de l’àrea de Barcelona (ATM), the Generalitat de Catalunya, the Diputació de Barcelona, the Catalan Association of Municipalities and Counties (ACM), and the Ajuntament de Sitges, aimed to promote various mobility sectors and upcoming changes to aid in the integration of technology into this sector.

The event was chosen as it offered members the opportunity to attend related presentations and network with individuals and companies in the same sectoral space. Key to the two-day gathering was an exploitation workshop and brainstorming session, chaired by Dr. Pat Lynch, (SETU) which allowed consortium members mutually explore commercial opportunities to exploit the technology and to provide a basis for the exploitation deliverable on the project’s completion.

Conference Outcome

Due to Covid restrictions this was the first opportunity for consortium members to meet in person. As a result, it was a key event, allowing all the opportunity to express their ideas and voice concerns about the platform before its full deployment. Good progress was made and many actions were taken from the conference. Follow up work will continue in the months to come.

Fully Homomorphic Encryption and its application to use-cases in a transport context

Fully homomorphic Encryption

Fully Homomorphic Encryption (FHE) is a recent cryptographic technology that allows a remote server to compute sensitive data in a privacy-preserving way. For example it can allow a hospital to perform statistics on encrypted input data from patients without knowing it in plain text, with medical confidentiality preserved. The applications of FHE can meet various domains, including multimodal transport.

What is fully homomorphic encryption ?

  • Homomorphic encryption : encryption technique that allows for the performance of some computations directly on encrypted data, without knowing it in plain text ;
  • Fully homomorphic encryption : homomorphic encryption that allows for the performance of (in theory) any kind of such computations.

  • Recent area of research, only theoretical just a few years ago;
  • The increase of the performances of homomorphic encryption is gradually breaking the technological barriers, allowing to scale up and use FHE in real life


  • Basic workflow :
    • A user encrypts its data and sends it to a remote server with a big storage capacity (potentially in a dynamic way) ;
    • The user requests a computation on this input data to the server ;
    • The server computes and sends the encrypted result to the user ;
    • The user decrypts and gets the result in plain text;
  • The server knows neither the input data nor the results of its own computations in plain text.



Some use-cases from a transport context

    • Use-cases for blind searches in a database :
      • Blind search of a driving license number in a blacklist, to check (in a privacy-preserving way) if a user that pretends to share a car has not been blacklisted before.
      • Blind search of an IP address in a blacklist, to check (in a privacy-preserving way) that a connexion to a multimodal transport network is not from an IP address that has been blacklisted before
        (network intrusion detection is important in transport context, as in many areas);
      • In an analogue way, FHE can allow a user to perform a blind search of an e-mail address or any other kind of data in a blacklist

    (a server that performs homomorphic computations on encrypted data is agnostic in the kind of the data in clear).


    • Use-case for blind set intersection :
      • Blind computation of an intersection between the interests of a passenger and services provided by a transport company. For instance, a user can search which kinds of restaurants are provided in an airport among the kinds she likes, in a privacy-preserving way.

Real-life aspects and performances

  • Our cluster dedicated to homomorphic encryption technologies uses 10 virtual machines hosted in OVH Cloud ;
  • Performance (focus on the use-case of blind search of an IP address in a blacklist as an example) :
  • 10 000 IP addresses checked in 5-6 seconds.

International Workshop on Privacy and Security of Multi-Modal Transport Systems (IWPSMTS 2022)

The IWPSMTS 2022 workshop was initially supported by: European Union’s Horizon 2020 E-Corridor project #883135

This workshop aimed to provide a forum for researchers and engineers in academia and industry to foster an exchange of research results, experiences, and products in the domain of security and privacy for multi-modal transport systems. Presentations focused on the advancement on the state of art in these fields and the adoption of developed technologies in several scenarios involving pilots from the domain.

The Symposium was held in conjunction with ARES 2022 and offered opportunities to become acquainted with recent results of research projects, meet potential project partners, and exchange ideas within the scientific community.

Presenters from E-Corridor at the conferece:

Roland Rieke (Fraunhofer SIT | ATHENE, Germany)
Stefano Sebastio (Collins ART, Ireland)
Florian Fenzl (Fraunhofer SIT | ATHENE, Germany)
Piotr Sobonski (Collins ART, Ireland)
Jean-Paul Bultel (CEA, France)
Henry Gadacz (Fraunhofer SIT | ATHENE, Germany)
Christian Plappert (Fraunhofer SIT | ATHENE, Germany)
Antoine Choffrut (CEA, France)
Hoang-Gia NGUYEN (CEA, France)
Marco de Vincenzi (CNR, Italy)

Implementation of an infrastructure for the ASI (advanced security infrastructure)

E-corridor Partner (CEA) has implemented an infrastructure for the ASI, and a component  that provides fully homomorphic encryption (FHE) schemes running in this infrastructure.

The ASI (advanced security infrastructure) is the component that provides advanced cryptographic algorithms needed to the security of the whole E-CORRIDOR framework. Several sub-components are planned to run on this infrastructure, the FHE provider being one of them.

Fully homomorphic encryption (FHE) is a recent cryptographic technique that allows to encrypt (and decrypt) data in a way such that a remote server can compute on this encrypted data and output an encrypted result without knowing neither the data no this result in clear.

E-Corridor Updates

  1. UPEC have submitted a conference paper for IEEE CASE titled "Hybrid approach for anticipating human activities in Ambient Intelligence environments".
    They are planning to submit another conference paper on the AT pilot to ACM Applied Computing (SAC) by September 2022.
  2. CEA is defining the role of a server that provides a solution to compute on encrypted data for industrial people.
  3. CEA has implemented an infrastructure for the ASI, and a component  that provides fully homomorphic encryption (FHE) schemes running in this infrastructure.
  4. CEA has implemented two IAI components (driving license checker, and IP blacklister) that interact with the ASI to compute on homomorphically encrypted data.
  5. CEA has designed a protocol to address a pilot use-case with ABE. This protocol allows or not a transaction between a passenger and a transport company according to a policy based on passenger's attributes.
  6. CEA has made three submissions for talks at the workshop IWPS HTS of the ARES conference, aboute solutions to address use-cases with FHE and ABE in contexts related with transports. 
  7. E-CORRIDOR is organizing the International Workshop on Privacy and Security of Multi-Modal Transport Systems (IWPSMTS 2022) that will be held on August 23 2022 in conjunction with the 17th International Conference on Availability, Reliability and Security  https://www.ares-conference.eu/workshops-eu-symposium/iwpsmts-2022/. IWPSMTS’22 aims at disseminating and exchange ideas on all the security aspects involving multi-modal transport services.