• Publications
  • Influence
Security of quantum key distribution with imperfect devices
This paper prove the security of the Bennett-Brassard (BB84) quantum key distribution protocol in the case where the source and detector are under the limited control of an adversary. This proof
Security against individual attacks for realistic quantum key distribution
I prove the security of quantum key distribution against individual attacks for realistic signals sources, including weak coherent pulses and downconversion sources. The proof applies to the BB84
Squashing models for optical measurements in quantum communication.
It is shown that a measurement used in the Bennett-Brassard 1984 (BB84) protocol does allow a squashing description, although the corresponding six-state protocol measurement does not.
Continuous variable quantum cryptography: beating the 3 dB loss limit.
It is shown that, by an appropriate postselection mechanism, one can enter a region where Eve's knowledge on Alice's key falls behind the information shared between Alice and Bob, even in the presence of substantial losses.
The SECOQC quantum key distribution network in Vienna
In this paper, we present the quantum key distribution (QKD) network designed and implemented by the European project SEcure COmmunication based on Quantum Cryptography (SECOQC) (2004?2008), unifying
Unconditional security of practical quantum key distribution
This paper is identical to the preprint arXiv:quant-ph/0107017, which was finalized in 2001, therefore, some of the more recent developments, including the question of composability, are not addressed.
Quantum information processing and communication
Abstract.We present an excerpt of the document “Quantum Information Processing and Communication: Strategic report on current status, visions and goals for research in Europe”, which has been
Security Aspects of Practical Quantum Cryptography
This work provides a thorough investigation of security issues for practical quantum key distribution, taking into account channel losses, and a realistic detection process.
Ultrafast and fault-tolerant quantum communication across long distances.
A new approach to QRs is investigated in which quantum information can be faithfully transmitted via a noisy channel without the use of long distance teleportation, thus eliminating the need to establish remote entangled links.
SECOQC White Paper on Quantum Key Distribution and Cryptography
It is detailed how the work on QKD networks lead within SECOQC will allow the deployment of long-distance secure communication infrastructures based on quantum cryptography, and what may be the next challenges in this direction.