quantum-protocol-designer

name	quantum-protocol-designer
description	Design and analyze quantum information processing protocols. Focus on quantum encoding schemes (polarization, time-bin), QKD security verification, topology-hiding protocols, and quantum state engineering. Activates when user asks about quantum protocol design, quantum network security, QKD protocols, or quantum encoding conversion.

Quantum Protocol Designer

设计和分析量子信息处理协议，包括编码转换、安全性验证和拓扑分析。

Activation Keywords

• quantum protocol design
• 量子协议设计
• QKD protocol
• quantum encoding
• quantum network security
• quantum key distribution
• 量子密钥分发
• topology-hiding
• 拓扑隐藏
• quantum state engineering

Tools Used

• exec: Run quantum simulation scripts, arxiv search
• write: Generate protocol documentation, create analysis reports
• read: Load reference protocols, knowledge graph data
• sqlite3: Query kg.db for related papers and patterns

Core Concepts

Quantum Encoding Schemes

Scheme	Description	Use Case
Polarization	Horizontal/Vertical, Diagonal basis	Short-distance, lab setups
Time-bin	Early/Late time bins	Long-distance, fiber networks
Phase encoding	Phase difference between paths	Interferometer-based systems
Frequency encoding	Different frequency modes	Multi-channel networks

Protocol Types

Protocol	Security Level	Key Feature
BB84	Information-theoretic	First QKD protocol
E91	Entanglement-based	Uses Bell states
** decoy-state**	Enhanced	Detects photon number attacks
Topology-hiding	Topology privacy	Zero-knowledge connectivity proof

Instructions for Agents

Step 1: Understand Protocol Requirements

Identify from user request:

• Encoding type: Polarization, time-bin, phase, frequency?
• Security requirement: Information-theoretic, computational, topology privacy?
• Network topology: Point-to-point, star, mesh, heterogeneous?
• Performance metrics: Key rate, error rate, distance?

Step 2: Search Knowledge Base

Query kg.db for related work:

sqlite3 kg.db "
SELECT e.name as paper, r.rel_type, k.name as keyword
FROM kg_relations r
JOIN kg_entities e ON r.source_id = e.id
JOIN kg_entities k ON r.target_id = k.id
WHERE e.entity_type = 'paper' 
  AND k.name LIKE '%quantum%'
ORDER BY r.created_at DESC LIMIT 10;
"

Step 3: Analyze Protocol Components

For each protocol, consider:

1. Encoding Layer

   • Basis choice mechanism
   • Basis conversion (if heterogeneous network)
   • Error correction scheme

2. Security Layer

   • Authentication method
   • Key verification
   • Attack detection (photon splitting, intercept-resend)
   • Zero-knowledge proofs (for topology-hiding)

3. Network Layer

   • Topology design
   • Repeater placement
   • Path validation
   • Multi-path support

Step 4: Generate Protocol Design

Output format:

# Quantum Protocol Design: [Protocol Name]

## Overview
[Brief description of protocol purpose and key features]

## Encoding Scheme
- **Primary basis**: [Polarization/Time-bin/Phase]
- **Conversion mechanism**: [If needed]
- **Error handling**: [Scheme]

## Security Verification
- **Authentication**: [Method]
- **Key verification**: [Protocol]
- **Attack detection**: [Mechanisms]
- **Topology hiding**: [If applicable, describe ZKP approach]

## Network Configuration
- **Topology**: [Description]
- **Path requirements**: [Disjoint paths, etc.]
- **Performance targets**: [Key rate, error threshold]

## Implementation Notes
- [Specific hardware requirements]
- [Software dependencies]
- [Testing considerations]

## References
- [Related papers from kg.db]
- [arxiv sources]

Step 5: Validate Design

Check for:

• Consistency: All components work together
• Security: No obvious vulnerabilities
• Feasibility: Hardware requirements are realistic
• Performance: Metrics achievable

Common Patterns

Pattern 1: Encoding Conversion

From recent paper (2604.02081v1):

• Polarization → Time-bin → Polarization
• Sources of infidelity become transmission rate changes
• Useful for heterogeneous networks

Pattern 2: Topology-Hiding QKD

From recent papers (2604.01876v1, 2604.01831v1):

• Graph-signature techniques
• Zero-knowledge proofs of connectivity
• Path validation without topology revelation
• Multi-path certification

Pattern 3: Quantum State Engineering

From recent papers (2604.01722v1, 2604.02234v1):

• Differentiable physical frameworks
• Goal-driven state preparation
• MUBs via Hadamard matrices
• Mathematical construction methods

Error Handling

Encoding Conversion Failure

• Check basis alignment
• Verify timing synchronization
• Adjust for fiber fluctuations

Security Verification Failure

• Increase decoy states
• Add authentication steps
• Verify key sifting process

Topology Revelation Risk

• Apply stronger zero-knowledge proofs
• Add noise to path information
• Use multiple disjoint paths

Resources

• Knowledge Graph: /Users/hiyenwong/wiki/kg.db
• Arxiv Search: scripts/search_arxiv.py
• Import Script: scripts/import_papers_to_kg.py
• kg_tool: scripts/kg_tool/target/release/kg_tool

Pattern 4: NLQC Task Equivalence Analysis (arXiv: 2606.26354)

For quantum position-verification and non-local computation protocols:

• NLQC tasks connected by bidirectional reductions share the same asymptotic entanglement cost scaling
• Redirect quantum system (classical control) implies controlled measurements in arbitrary bases, controlled Clifford unitaries, and controlled $U = C_1 D C_0$ (D diagonal)
• Security analysis of the simplest equivalent task extends to all tasks in the reduction class
• Key insight: When designing or analyzing a position-verification scheme, find the minimal NLQC task it reduces to — that task determines the entanglement cost lower bound
• Gate teleportation and measurement-based QC are the primary reduction tools

Related Skills

• quantum-nlqc-reductions — NLQC task reduction methodology for position-verification security analysis
• skill-extractor: Extract patterns from quantum papers
• skill-creator: Create specialized quantum skills
• arxiv-search: Search quantum papers on arxiv

Notes

• Quantum protocols require both theoretical analysis and practical feasibility
• Knowledge graph contains 133+ papers for reference
• kg_tool has issues with PageRank/Louvain - use SQL queries instead