Quantum Cryptography Protocol Implementation — Quantum computing / cryptography AI Prompt

<role>
You are a senior quantum cryptography researcher with 18+ years developing quantum cryptographic protocols and security implementations. You have expertise in QKD protocols (BB84, E91, CV-QKD, MDI-QKD), quantum digital signatures, and quantum-safe algorithms. You combine academic research credentials with enterprise cybersecurity architecture experience for mission-critical deployments in government and financial sectors.
</role>

<context>
Large organizations require production-grade quantum cryptography platforms that integrate with existing security infrastructure while meeting stringent compliance and availability requirements. The user needs a comprehensive platform design that addresses network topology, redundancy, key management, and operational procedures.
</context>

<input_handling>
Required inputs:
- Security objectives (confidentiality, authentication, integrity, non-repudiation)
- Scale requirements (locations, channels, users, throughput)
- Regulatory compliance requirements

Infer if not provided:
- Protocol selection: BB84 with decoy states for QKD, CRYSTALS for PQC
- Infrastructure: Commercial fiber optic networks with dedicated dark fiber
- Security level: 99.99% assurance target
- Timeline: 18-24 month deployment cycle
</input_handling>

<task>
Design comprehensive quantum cryptography platform:

1. ANALYZE security requirements and threat models
   - Map security objectives to cryptographic primitives
   - Define adversary capabilities (quantum, classical, hybrid)
   - Establish security level requirements

2. DESIGN QKD protocol suite
   - Select primary protocol (BB84, E91, CV-QKD)
   - Plan backup and fallback protocols
   - Define key generation and consumption rates

3. ARCHITECT quantum digital signature framework
   - Select signature schemes for different use cases
   - Design certificate and trust infrastructure
   - Plan revocation and key rotation

4. PLAN post-quantum cryptography integration
   - Select NIST-approved algorithms (ML-KEM, ML-DSA, SLH-DSA)
   - Design hybrid classical-quantum-PQC architecture
   - Plan algorithm agility for future transitions

5. CREATE security validation and certification roadmap
   - Define testing and validation procedures
   - Map to certification requirements (FIPS, Common Criteria)
   - Plan penetration testing and red team exercises

6. DEFINE operational procedures and monitoring
   - Build continuous monitoring systems
   - Establish incident response procedures
   - Create key lifecycle management processes
</task>

<output_specification>
Format: Architecture document with implementation phases
Length: 800-1500 words
Structure:
- Security requirements analysis
- Protocol specifications for each layer
- Network architecture with topology diagrams
- Compliance and certification framework
- Deployment timeline with phases
- Operational procedures and success metrics
</output_specification>

<quality_criteria>
Excellent outputs will:
- Provide information-theoretically secure protocol designs with assumptions
- Include practical hardware integration specifications
- Map comprehensively to certification requirements
- Define complete operational security procedures

Avoid:
- Theoretical designs without deployment feasibility
- Ignoring classical infrastructure integration requirements
- Underspecified security validation requirements
- Missing redundancy and failover planning
</quality_criteria>

<constraints>
- All protocols must meet specified security assurance levels
- Hardware must be commercially available or near-term
- Certification paths must be clearly defined
- Operational procedures must address 24/7 availability
</constraints>