Noise and measurement errors in a practical two-state quantum bit commitment protocol
نویسندگان
چکیده
Ricardo Loura, Álvaro J. Almeida, Paulo S. André, Armando N. Pinto, Paulo Mateus and Nikola Paunković1,2,∗ SQIG – Instituto de Telecomunicações, IST-TU Lisbon, 1049-001 Lisbon, Portugal Department of Mathematics, IST, Technical University of Lisbon, 1049-001, Lisbon, Portugal Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal Instituto de Telecomunicações, University of Aveiro, 3810-193 Aveiro, Portugal and Department of Electronics, Telecommunications and Informatics, 3810-193 Aveiro, Portugal
منابع مشابه
Security of two-state and four-state practical quantum bit-commitment protocols
We study cheating strategies against a practical four-state quantum bit-commitment protocol [4] and its two-state variant [10] when the underlying quantum channels are noisy and the cheating party is constrained to using single-qubit measurements only. We show that simply inferring the transmitted photons’ states by using the Breidbart basis, optimal for ambiguous (minimum-error) state discrimi...
متن کاملA Brief Review on Quantum Bit Commitment
In classical cryptography, the bit commitment scheme is one of the most important primitives. We review the state of the art of bit commitment protocols, emphasizing its main achievements and applications. Next, we present a practical quantum bit commitment scheme, whose security relies on current technological limitations, such as the lack of long-term stable quantum memories. We demonstrate t...
متن کاملQuantum Bit Commitment Using Entangled States
Based on the fact that the entanglement can not be created locally, we proposed a quantum bit commitment protocol, in which entangled states and quantum algorithms is used. The bit is not encoded with the form of the quantum states, and delaying the measurement is required. Therefore the protocol will not be denied by the Mayers-Lo-Chau no-go theorem, and unconditional security is achieved. Typ...
متن کاملHow Unconditionally Secure Quantum Bit Commitment Is Possible
Bit commitment involves the submission of evidence from one party to another so that the evidence can be used to confirm a later revealed bit value by the first party, while the second party cannot determine the bit value from the evidence alone. It is widely believed that unconditionally secure quantum bit commitment is impossible due to quantum entanglement cheating, which is codified in a ge...
متن کاملRelativistic Quantum Bit Commitment
A new relativistic quantum protocol is proposed allowing to implement the bit commitment scheme. The protocol is based on the idea that in the relativistic case the field propagation to the region of space accessible to measurement requires, contrary to the non-relativistic case, a finite non-zero time which depends on the structure of the particular state of the field. In principle, the secret...
متن کامل