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Fast Quantum Byzantine Agreement: Difference between revisions
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==Further Information== | ==Further Information== | ||
* The protocol [[Quantum Byzantine Agreement#References|(3)]] is based on the classical protocol of [[Quantum Byzantine Agreement#References|(7)]], where the classical Oblivious Common Coin is replaced by a Quantum | * The protocol [[Quantum Byzantine Agreement#References|(3)]] is based on the classical protocol of [[Quantum Byzantine Agreement#References|(7)]], where the classical Oblivious Common Coin is replaced by a quantum version. This Quantum Oblivious Common Coin is based on the Verifiable Quantum Secret Sharing Scheme presented in [[Quantum Byzantine Agreement#References|(4)]]. | ||
* The classical protocol of [[Quantum Byzantine Agreement#References|(7)]] also runs in constant expected time, but can only deal with limited-information adversaries. This means that the adversaries can not read communication between honest parties and read their internal state. | |||
* The classical lower bound in the full-information Byzantine failure model of <math>\Omega\left(\sqrt{n / \log n}\right)</math> is proven in [[Quantum Byzantine Agreement#References|(6)]]. | |||
* The work [[Quantum Byzantine Agreement#References|(3)]] also provides a protocol in a weaker failure model known as fail-stop failures. Here the nodes will crash and stop working indefinitely (stop responding). Another protocol in the same model is presented in [[Quantum Byzantine Agreement#References|(2)]]. | * The work [[Quantum Byzantine Agreement#References|(3)]] also provides a protocol in a weaker failure model known as fail-stop failures. Here the nodes will crash and stop working indefinitely (stop responding). Another protocol in the same model is presented in [[Quantum Byzantine Agreement#References|(2)]]. | ||
* Another weakened version of the problem, known as detectable byzantine agreement, is solved with quantum resources in [[Quantum Byzantine Agreement#References|(5)]] (and following works). In detectable byzantine agreement, the protocol is also allowed to abort (upon detecting failures) instead of reaching agreement. | * Another weakened version of the problem, known as detectable byzantine agreement, is solved with quantum resources in [[Quantum Byzantine Agreement#References|(5)]] (and following works). In detectable byzantine agreement, the protocol is also allowed to abort (upon detecting failures) instead of reaching agreement. | ||