Télécom ParisTech    
Quantum Information and Applications Group
Networks and Computer Science Department

Contact Information
23, avenue d'Italie

75013 Paris, France
Tel. +33(0)

Fax +33(0)
E-mail: romain.alleaume at telecom-paristech.fr

 Logo Telecom ParisTech
Paris Center for
Quantum Computing  

Logo Telecom ParisTech

Research interests:

My research is centered on quantum information and quantum cryptography, with a particular focus on optical quantum communications and quantum key distribution (QKD).

I am currently working on three main research projects

* Quantum coherent optical communications, with an emphasis on continuous-variable quantum key distribution, experimental system development and optical networking.

* Hybrid (quantum/computational) security models in quantum cryptography. The objective is to develop new protocols capable of offering long-term security guarantees - inaccessible with computational-only techniques - while presenting higher versatility, better performances and lower implementation complexity than QKD.

* Quantum information processing with multimode photonic technologies  The objective is to leverage on some existing components developped for the telecom industry to process high-dimensional quantum states, encoded over frequency modes. Targeted applications range from quantum computing and quantum metrology to quantum cryptography.

Current Research grants:

* QCALL (Quantum Communications for all). 2017-2020
 European Innovative Training Network (project 675662) funded by the Marie Sklodowska Curie Call H2020-MSCA-ITN-2015.

* CiViQ (Continuous Variable Quantum Communications). 2018-2021
Research and Innovation Action, Quantum Technology Flagship / Q communications pillar, (project No 820466).

* OPENQKD (Open European Quantum Key Distribution Testbed). 2019-2022
Research and Innovation Action, Quantum Technology Flagship (project in negotiation).

* Télécom ParisTech / Télécom Alumni: PhD grant on the convergence of classical and quantum coherent communications ( PhD applicant: Raphaël Aymeric, co-supervised with Cédric Ware). 2018-2021


After graduating from ENS Paris, Romain Alléaume has completed his PhD at University Paris VI and ENS Cachan in 2004, on experimental quantum cryptography with single-photon sources, he was the co-recipient of “magazine La Recherche” scientific prize 2004. He then joined Telecom ParisTech to coordinate of the work on QKD networks performed within the European FP6 project SECOQC that culminated by the first demonstration of a QKD network in Europe. Romain Alléaume co-founded the start-up company SeQureNet in 2008, who has developped the first commercial continous-variable QKD product, Cygnus, released in 2012. He participated to two national projects on quantum key distribution PROSPIQ (2006-2009) and SEQURE (2007-2010), as well as the French-Canadian project FREQUENCY dedicated fundamental research on quantum cryptography. Romain Alléaume then coordinated national and european projects, with an emphasis on QKD implementation security (FP7 Q-CERT, 2008-2012) and on the optical integration of QKD in telecommunications networks (French ANR Quantum-WDM, 2012-2015). He is also a member of the ETSI QKD Industry Standardization Group, and an active contributor to the international scientific and technical effort on QKD technology, and quantum cryptography.


Publications in quant-ph

Publications on Google Scholar

Recent publications:

Hao Qin, Rupesh Kumar, Vadim Makarov and Romain Alléaume,  Homodyne detector blinding attack in continuous-variable quantum key distribution, , Accepted for publication in Phys Rev. A., (2018)

Adrien Marie and Romain Alléaume, Self-coherent phase reference sharing for continuous-variable quantum key distribution, Phys. Rev. A 95, 012316 (2017)

Hao Qin, Rupesh Kumar, Romain Alléaume. Quantum hacking: saturation attack on practical continuous-variable quantum key distribution, Phys. Rev. A 94, 012325 (2016)

Rupesh Kumar, Hao Qin, Romain Alléaume, Coexistence of continuous variable QKD with intense DWDM classical channels, New Journal of Physics, 17(4), 043027. (2015).


Romain Alléaume, Communications with everlasting security from short-term-secure encrypted communication. International Patent Application WO2016110582A1, issue date 10/08/2019, claiming priority of EP3043508B1 filed in January 2015.

Romain Alléaume, Adrien Marie, Phase reference sharing schemes for continuous-variable quantum cryptography, International Patent Application WO20171194582A1, claiming priority of EP3244566A1 filed in April 2016.

Professional activities

* PC member of QCrypt 2016
* PC member of Qcrypt 2014,
* PC member of QCrypto 2012
* Chair of Workshop on Post-Quantum Security Models, Paris, Oct 2010
* Organizing committee QCrypt 2014 (Paris), Chair of the Industry session

* Member of the Scientific Committee of the QT Flagship project CiViQ (2018-2021)

Member of the ETSI QKD Industry Standardization Group: Co-founder, Responsible of the work item QKD Deployment

* Member of the Conseil Scientifique "Technologies Quantiques" at French Ministry of Research and Higher Education, 2017-2018.

* Expert for the European Commission (DG CNECT) on Quantum Communications and  Quantum Networks. 2017-2018-2019.

* Reviewer: Nature, Nature Communications, Physical Review A,
Journal of Lightwave Technologies, New Journal of Physics, IOP Quantum Science and Technology, Journal of Physics A, Optics Express, Quantum Information and Computation, Npj Quantum Information, Journal of Quantum Electronics, Quantum Information and Computation.


* Quantum computing and quantum information, ACCQ206, Master1 course at Telecom ParisTech (2016-2019)

* Quantum communications, Option of Masters 2 OMP and LuMi, (2013-2019)

* Introduction to Quantum cryptography and quantum computing, Master Cybersecurity, (2016-2019).

* Security services and cryptographic mechanisms, SR2I202, M1 course at Telecom ParisTech, (2010-2019)

* Micro-Nano-Physics, MNP, First year (L3) course on quantum mechanics and statistical physics at Telecom ParisTech, (2012-2019)

* Introduction to Quantum information and quantum computing, Formation des Ingénieurs du Corps des Mines (2012, 2013, 2014, 2017, 2018)

* Quantum Computation and Communications, SI349, M1 course at Telecom ParisTech (2006-2012)

* Quantum Cryptography, quantum coding and quantum information theory, MDI 344 , Master 1 course at Telecom ParisTech(2009, (2010).

* Information Theory, COMMDI225, M1 course at Telecom ParisTech (2006, 2007)

* Error Correcting Codes, within the Master Spécialisé Radio Mobile (2005, 2006, 2007)

Open Post-Doc Position

Experimental Quantum Coherent Communications
Description here

Applications by December 2019


March 8-12 2020: Invited Talk at OFC, San Diego, USA

Jan 26-31 2020: Invited lecturer on CV-QKD, IdQuantique Winter school.

Oct.1-2 2019: OpenQKD Kick-off
in Vienna.  Quantum Technology Flagship

June 21 2019: Talk at Boolean Functions and Applications workshop in Florence on Quantum-Computatonal Cryptography

April 10 2019: Talk at Leonard, Paris, on the training of future "Quantum Engineers".
Slides here

April 4 2019: Inviteld talk at French Photonics Days, on QKD industrialization.
Slides here