Quantum Byzantine Agreement¶

This shows that the quantum implementation of classical Byzantine Agreement protocols is indeed feasible.

Version: v1 · 2026-09-28 · History
Domain-specific #: 11599
Domain group: Applied Sciences & Engineering
Origin domain: Computer Science & Software Engineering
Subdomains: Distributed Computing, Quantum Computing → Computer Science & Software Engineering

Core Idea¶

Quantum Byzantine Agreement is treated here as the recurring computer science and information systems identity summarized by this source-grounded definition: This shows that the quantum implementation of classical Byzantine Agreement protocols is indeed feasible. Byzantine fault tolerant protocols are algorithms that are robust to arbitrary types of failures in distributed algorithms. The Byzantine agreement protocol is an essential part of this task. The constant-time quantum version of the Byzantine protocol, is described below. The outcome 0 is defined as A winning and 1 as B winning.

Scope of Application¶

We will sketch here the asynchronous algorithm. A coin flipping protocol is a procedure that allows two parties A and B that do not trust each other to toss a coin to win a particular object.
Verifiable secret sharing. A verifiable secret sharing protocol: A (n,k) secret sharing protocol allows a set of n players to share a secret, s such that only a quorum of k or more.
Grade-cast protocol. We note that for the purpose of our Byzantine quantum coin flip protocol the recovery stage is much simpler.
Introduction. It takes its name from a problem formulated by Lamport, Shostak and Pease in 1982, which itself is a reference to a historical problem.
Introduction. The Byzantine army was divided into divisions with each division being led by a General with the following properties.

Clarity¶

A clear use of Quantum Byzantine Agreement names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is This shows that the quantum implementation of classical Byzantine Agreement protocols is indeed feasible. The strongest recognition evidence in the frozen account is: The Byzantine army was divided into divisions with each division being led by a General with the following.

Manages Complexity¶

Quantum Byzantine Agreement compresses multiple computer science and information systems details into a stable diagnostic relation. The source shows both the central mechanism—here again the verification requires Byzantine Agreement, but replacing the agreement by the grade-cast protocol is enough.—and the practical consequence—for example, given a space shuttle with multiple redundant processors, if the processors give conflicting data, which processors or sets of processors should be believed?

Abstract Reasoning¶

Type the carrier. Identify the computer science and information systems entities to which the claim applies.
State the relation. Use the source-grounded identity: This shows that the quantum implementation of classical Byzantine Agreement protocols is indeed feasible.
Check operation and conditions. It takes its name from a problem formulated by Lamport, Shostak and Pease in 1982, which itself is a reference to a historical problem.
Demand recognition evidence.

Knowledge Transfer¶

Within the home domain. Knowledge about Quantum Byzantine Agreement transfers literally when a new case preserves the same carrier type, relation, and recognition test. A coin flipping protocol is a procedure that allows two parties A and B that do not trust each other to toss a coin to win a particular object. A verifiable secret sharing protocol: A (n,k) secret sharing protocol allows a set of n players to share a secret, s such that only a quorum of k or more players can discover the secret. Beyond the home domain.

Relationships to Other Abstractions¶

Current abstraction Quantum Byzantine Agreement Domain-specific

Parents (1) — more general patterns this builds on

Quantum Byzantine Agreement is a decomposition of Consensus Prime

Quantum Byzantine agreement is the quantum-communication framing of reaching agreement despite faulty or adversarial participants.

Neighborhood in Abstraction Space¶

Quantum Byzantine Agreement sits in a moderately populated region (51^st percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.

Family — Computation Models & Complexity Classes (37 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08