BB84
BB84 is a quantum key distribution scheme developed by Charles Bennett and Gilles Brassard in 1984. It is the first quantum cryptography protocol. The protocol is provably secure, relying on two condi
MSZ96
MSZ96 is a quantum key distribution protocol which allows a cryptographic key bit to be encoded using four nonorthogonal quantum states described by non-commuting quadrature phase amplitudes of a weak
Quantum secret sharing
Quantum secret sharing (QSS) is a quantum cryptographic scheme for secure communication that extends beyond simple quantum key distribution. It modifies the classical secret sharing (CSS) scheme by us
Six-state protocol
The six-state protocol (SSP) is the quantum cryptography protocol that is the version of BB84 that uses a six-state polarization scheme on three orthogonal bases.
Quantum capacity
In the theory of quantum communication, the quantum capacity is the highest rate at which quantum information can be communicated over many independent uses of a noisy quantum channel from a sender to
SARG04
SARG04 (named after Valerio Scarani, Antonio Acin, Gregoire Ribordy, and Nicolas Gisin) is a 2004 quantum cryptography protocol derived from the first protocol of that kind, BB84.
QuintessenceLabs
QuintessenceLabs Pty Ltd. (or QuintessenceLabs) is a cybersecurity company headquartered in Canberra, Australia with offices in San Jose, California. QuintessenceLabs produces encryption key and polic
List of quantum key distribution protocols
Quantum key distribution (QKD) protocols are used in quantum key distribution. The first protocol of that kind was BB84, introduced in 1984 by Charles H. Bennett and Gilles Brassard. After that, many
Relativistic quantum cryptography
Relativistic quantum cryptography is a sub-field of quantum cryptography, in which in addition to exploiting the principles of quantum physics, the no-superluminal signalling principle of relativity t
Three-stage quantum cryptography protocol
The three-stage quantum cryptography protocol, also known as Kak's three-stage protocol is a method of data encryption that uses random polarization rotations by both Alice and Bob, the two authentica
KMB09 protocol
KMB09 protocol (named after Muhammad Mubashir Khan, Michael Murphy and Almut Beige) is an alternative quantum key distribution protocol, where Alice and Bob use two mutually unbiased bases with one of
Glossary of quantum computing
This glossary of quantum computing is a list of definitions of terms and concepts used in quantum computing, its sub-disciplines, and related fields. Bacon–Shor_codeis a Subsystem error correcting cod
Quantum coin flipping
Consider two remote players, connected by a channel, that don't trust each other. The problem of them agreeing on a random bit by exchanging messages over this channel, without relying on any trusted
DARPA Quantum Network
The DARPA Quantum Network (2002–2007) was the world's first quantum key distribution (QKD) network, operating 10 optical nodes across Boston and Cambridge, Massachusetts. It became fully operational o
Quantum key distribution
Quantum key distribution (QKD) is a secure communication method which implements a cryptographic protocol involving components of quantum mechanics. It enables two parties to produce a shared random s
QNu Labs
QNu Labs (or QuNu Labs Private Limited) is a cybersecurity company headquartered in Bengaluru, India. It is credited to be the first firm in India to successfully develop commercial cybersecurity prod
Hidden Matching Problem
The Hidden Matching Problem is a computation complexity problem that can be solved using quantum protocols: Let be a positive even integer. In the Hidden Matching Problem, Alice is given and Bob is gi
Visible Light Photon Counter
A Visible Light Photon Counter (VLPC) is a photon counting photodetector based on impurity-band conduction in arsenic-doped silicon. They have high quantum efficiency and are able to detect single pho
Quantum readout
Quantum readout is a method to verify the authenticity of an object. The method is secure provided that the object cannot be copied or physically emulated.
Decoy state
Within quantum cryptography, the Decoy state quantum key distribution (QKD) protocol is the most widely implemented QKD scheme. Practical QKD systems use multi-photon sources, in contrast to the stand
BBM92 protocol
BBM92 is a quantum key distribution without Bell's theorem developed using polarized entangled photon pairs by Charles H. Bennett , Gilles Brassard and N. David Mermin in 1992. It is named after the t
Quantum cryptography
Quantum cryptography is the science of exploiting quantum mechanical properties to perform cryptographic tasks. The best known example of quantum cryptography is quantum key distribution which offers
Quantum network
Quantum networks form an important element of quantum computing and quantum communication systems. Quantum networks facilitate the transmission of information in the form of quantum bits, also called
ID Quantique
ID Quantique (IDQ) is a Swiss company, based in Geneva, Switzerland, and provides quantum key distribution (QKD) systems, quantum safe network encryption, single photon counters, and hardware random n
Device-independent quantum cryptography
A quantum cryptographic protocol is device-independent if its security does not rely on trusting that the quantum devices used are truthful.Thus the security analysis of such a protocol needs to consi
Noisy-storage model
The noisy-storage model refers to a cryptographic model employed in quantum cryptography. It assumes that the quantum memory device of an attacker (adversary) trying to break the protocol is imperfect
Quantum computing
Quantum computing is a type of computation whose operations can harness the phenomena of quantum mechanics, such as superposition, interference, and entanglement. Devices that perform quantum computat