104 citations · 833 across the 15 of their papers we have counts for
16 papers
Observing quantum coherence from photons scattered in free-space
Shihan Sajeed, Thomas Jennewein
Quantum channels in free-space, an essential prerequisite for fundamental tests of quantum mechanics and quantum technologies in open space, have so far been based on direct line-o…
A generalized efficiency mismatch attack to bypass detection-scrambling countermeasure
M A Ruhul Fatin, Shihan Sajeed
The ability of an eavesdropper to compromise the security of a quantum communication system by changing the angle of the incoming light is well-known. Randomizing the role of the d…
Attacking quantum key distribution by light injection via ventilation openings
Juan Carlos Garcia-Escartin, Shihan Sajeed, Vadim Makarov
Quantum cryptography promises security based on the laws of physics with proofs of security against attackers of unlimited computational power. However, deviations from the origina…
An approach for security evaluation and certification of a complete quantum communication system
Shihan Sajeed, Poompong Chaiwongkhot, Anqi Huang +8
Although quantum communication systems are being deployed on a global scale, their realistic security certification is not yet available. Here we present a security evaluation and…
Bright-light detector control emulates the local bounds of Bell-type inequalities
Shihan Sajeed, Nigar Sultana, Charles Ci Wen Lim +1
It is well-known that no local model - in theory - can simulate the outcome statistics of a Bell-type experiment as long as the detection efficiency is higher than a threshold valu…
Eavesdropper's ability to attack a free-space quantum-key-distribution receiver in atmospheric turbulence
Poompong Chaiwongkhot, Katanya B. Kuntz, Yanbao Zhang +6
The ability of an eavesdropper (Eve) to perform an intercept-resend attack on a free-space quantum key distribution (QKD) receiver by precisely controlling the incidence angle of a…
Eavesdropping and countermeasures for backflash side channel in quantum cryptography
Paulo Vinicius Pereira Pinheiro, Poompong Chaiwongkhot, Shihan Sajeed +5
Quantum key distribution (QKD) promises information theoretic secure key as long as the device performs as assumed in the theoretical model. One of the assumptions is an absence of…
Invisible Trojan-horse attack
Shihan Sajeed, Carter Minshull, Nitin Jain +1
We demonstrate the experimental feasibility of a Trojan-horse attack that remains nearly invisible to the single-photon detectors employed in practical quantum key distribution (QK…
Finite-key-size effect in commercial plug-and-play QKD system
Poompong Chaiwongkhot, Shihan Sajeed, Lars Lydersen +1
A security evaluation against the finite-key-size effect was performed for a commercial plug-and-play quantum key distribution (QKD) system. We demonstrate the ability of an eavesd…
Insecurity of detector-device-independent quantum key distribution
Shihan Sajeed, Anqi Huang, Shihai Sun +3
Detector-device-independent quantum key distribution (ddiQKD) held the promise of being robust to detector side-channels, a major security loophole in QKD implementations. In contr…
Testing random-detector-efficiency countermeasure in a commercial system reveals a breakable unrealistic assumption
Anqi Huang, Shihan Sajeed, Poompong Chaiwongkhot +3
In the last decade, efforts have been made to reconcile theoretical security with realistic imperfect implementations of quantum key distribution (QKD). Implementable countermeasur…
Creation of backdoors in quantum communications via laser damage
Vadim Makarov, Jean-Philippe Bourgoin, Poompong Chaiwongkhot +7
Practical quantum communication (QC) protocols are assumed to be secure provided implemented devices are properly characterized and all known side channels are closed. We show that…
Experimental Quantum Fingerprinting
Feihu Xu, Juan Miguel Arrazola, Kejin Wei +6
Quantum communication holds the promise of creating disruptive technologies that will play an essential role in future communication networks. For example, the study of quantum com…
Security loophole in free-space quantum key distribution due to spatial-mode detector-efficiency mismatch
Shihan Sajeed, Poompong Chaiwongkhot, Jean-Philippe Bourgoin +3
In free-space quantum key distribution (QKD), the sensitivity of the receiver's detector channels may depend differently on the spatial mode of incoming photons. Consequently, an a…
Attacks exploiting deviation of mean photon number in quantum key distribution and coin tossing
Shihan Sajeed, Igor Radchenko, Sarah Kaiser +5
The security of quantum communication using a weak coherent source requires an accurate knowledge of the source's mean photon number. Finite calibration precision or an active mani…
Experimental quantum key distribution with source flaws
Feihu Xu, Kejin Wei, Shihan Sajeed +6
Decoy-state quantum key distribution (QKD) is a standard technique in current quantum cryptographic implementations. Unfortunately, existing experiments have two important drawback…