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<span id="software-requirements-specification"></span> = Software Requirements Specification = for Nomos: A Privacy-Preserving Multi-Chain Heterogeneous Blockchain Network Version 1.0 Prepared by Jarrad Hope 29-12-24 <span id="introduction"></span> == 1. Introduction == <span id="purpose"></span> === 1.1 Purpose === This Software Requirements Specification (SRS) document provides a detailed description of the Nomos blockchain network. It outlines the functional and non-functional requirements for a privacy-preserving multi-chain heterogeneous blockchain network designed to serve as infrastructure for Network States. As such the sovereignty of the system is paramount, requiring privacy through all layers of a typical Blockchain network - network level privacy, validator & consensus privacy, mempool privacy, transaction privacy, bridging/intent privacy, etc. Consequentially, the network participants create a decentralised authority - a digital parliamentary sovereign, and become ‘Subject-Individuals’ who are bestowed Civil Liberties. <span id="document-conventions"></span> === 1.2 Document Conventions === This document uses the following conventions: * MUST/REQUIRED - Indicates mandatory requirements for MVP * SHOULD/RECOMMENDED - Indicates requirements for subsequent releases * MAY/OPTIONAL - Indicates optional features Terms in ''italics'' are defined in the glossary. <span id="intended-audience-and-reading-suggestions"></span> === 1.3 Intended Audience and Reading Suggestions === This document is intended for: * Developers implementing the Nomos protocol * Validators and node operators * Network State builders and application developers * Security auditors and researchers Readers should start with Section 1 for an overview, then: * Developers should focus on Sections 3 and 4 * Node operators should focus on Sections 2.4 and 5 * Application developers should focus on Sections 2.2 and 4.3 * Security auditors should focus on Sections 4.4 and 5.2 <span id="product-scope"></span> === 1.4 Product Scope === The Nomos module is a blockchain network designed to serve as foundational infrastructure for Network States. Its key objectives are: * Enable privacy-preserving blockchain transactions and computations * Support multiple sovereign execution environments (Zones) * Provide censorship resistance through network-level privacy * Ensure high network resilience through decentralization * Enable trust-minimized communication between Zones * Support light client verification The system aims to overcome limitations of existing blockchain networks by providing comprehensive privacy at every layer: * Network level: Private P2P communication through libp2p-mix * Consensus level: Private Proof of Stake through Blend Network & Cryptarchia * Mempool level: Private transaction propagation * Execution level: Privacy-preserving computation in Zones * Cross-zone level: Private cross-zone communication (bridging and intent matching) * Light client level: Private verification capabilities This is achieved through: * Modular architecture separating consensus, execution, and data availability * Sovereign zones with flexible configurations * Multiple specialized privacy systems working together <span id="references"></span> === 1.5 References === * Nomos Darkpaper v0.6 * Nomos Blend Network Documentation * Cryptarchia Protocol Specification * Native Zones Documentation * IEEE 830-1998 Recommended Practice for Software Requirements Specifications <span id="overall-description"></span> == 2. Overall Description == <span id="product-perspective"></span> === 2.1 Product Perspective === Nomos is a novel blockchain system composed of three main layers: # Base Layer (BL) * Provides data availability and consensus * Implements Private Proof of Stake * Focuses on network resilience and censorship resistance * Scales through sharding and data availability sampling # Coordination Layer (CL) * Enables state transition verification through zero-knowledge proofs * Provides intent matching and proof aggregation * Handles cross-zone communication * Manages special operations like zone creation # Zones * Independent execution environments * Can be configured as ZK-rollups or virtual sidechains * Share data availability and consensus from Base Layer * Support arbitrary execution models and privacy requirements The system is verified by a network of Light Nodes that provide additional security and decentralization. <span id="product-functions"></span> === 2.2 Product Functions === The major functions of Nomos include: Base Layer MUST: * Execute Private Proof of Stake consensus through Blend Network & Cryptarchia * Provide data availability guarantees * Enable network-level privacy through the libp2p-mix module * Support sharding for scalability * Process and order data blobs Coordination Layer MUST: * Verify zero-knowledge proofs * Enable cross-zone communication * Manage zone lifecycle operations * Support intent matching and aggregation * Process special operations Zones MUST: * Support independent state execution * Enable flexible security/performance tradeoffs * Allow arbitrary execution models * Support privacy-preserving computation * Enable data availability sampling <span id="user-classes-and-characteristics"></span> === 2.3 User Classes and Characteristics === The system serves the following user classes, who collectively participate in network governance: # Validators * Operate nodes in the Base Layer and Coordination Layer * Require technical knowledge to run nodes * Need to stake tokens as security deposit * Participate in consensus and verification * Contribute to network security and decentralization # Zone Operators * Deploy and manage sovereign execution environments * Require deep technical knowledge * Need to ensure zone security and performance * May implement custom privacy features * Enable sovereign community governance # Application Developers * Build applications on zones * Need to understand zone capabilities * Implement corruption-resistant institutions * Interact with cross-zone communication * Create tools for community coordination # End Users * Interact with applications built on zones * Run light nodes for verification * Require privacy protections * Need simple interfaces * Participate in network validation and governance <span id="operating-environment"></span> === 2.4 Operating Environment === The Base Layer MUST: * Support commodity hardware for validators * Operate on standard Linux/Unix systems * Support home internet connections * Handle intermittent connectivity The Coordination Layer MUST: * Support specialized hardware for proof generation * Operate on high-performance systems * Handle high bandwidth requirements * Support distributed proof generation Zones MAY: * Require specialized hardware * Implement custom networking protocols * Support different consensus mechanisms * Have unique performance requirements <span id="design-and-implementation-constraints"></span> === 2.5 Design and Implementation Constraints === The system has the following constraints: # Required Privacy Constraints (MVP) * Network communication MUST be privacy-preserving through libp2p-mix * Validator stakes MUST remain private through Blend Network * Block proposers MUST remain anonymous through Cryptarchia * Cross-zone communication MUST support basic privacy guarantees * Intent matching SHOULD preserve privacy where possible # Performance Constraints (MVP) * Base Layer MUST support commodity hardware * Light nodes MUST operate with minimal resources * Proof generation MUST be practical * Network bandwidth usage MUST be optimized * Message mixing overhead MUST be manageable # Security Constraints (MVP) * No trusted setup for core protocol * No centralized components * Basic cryptographic primitives MUST be proven secure * Security MUST scale with network size * Privacy guarantees MUST be maintained under partial compromise # Compatibility Constraints (MVP) * MUST support different zone architectures * MUST enable cross-zone communication * MUST support core privacy technologies * MUST enable sovereign execution environments * MUST allow flexible privacy/performance tradeoffs <span id="user-documentation"></span> === 2.6 User Documentation === The following documentation MUST be provided: * Node operator guides * Zone deployment documentation * Application development guides * Light node user guides * Protocol specifications * Security documentation <span id="assumptions-and-dependencies"></span> === 2.7 Assumptions and Dependencies === Assumptions: * Cryptographic primitives remain secure * Network bandwidth continues to increase * Hardware costs continue to decrease * Privacy remains a priority for users Dependencies: * Required Privacy Technologies: ** Zero-knowledge proof systems for state verification ** Message mixing and blending for consensus privacy ** Cover traffic generation for anonymity sets ** Private P2P communication protocols * Recommended Privacy Enhancements: ** Intent privacy techniques ** Relationship hiding mechanisms ** Advanced cryptographic primitives * Core Infrastructure: ** Data availability sampling ** Distributed key generation ** Threshold cryptography <span id="external-interface-requirements"></span> == 3. External Interface Requirements == <span id="user-interfaces"></span> === 3.1 User Interfaces === The system MUST provide the following interfaces: # Validator Node Interface * Command line interface for node operation * Configuration management interface * Monitoring and metrics interface * Key management interface # Zone Operator Interface * Zone deployment interface * Zone management interface * State transition interface * Cross-zone communication interface # Developer Interface * Zone development SDK * Smart contract interfaces * Privacy-preserving computation interfaces * Cross-zone communication APIs # Light Node Interface * Simple setup interface * Verification interface * Network coordination interface * Data availability sampling interface <span id="hardware-interfaces"></span> === 3.2 Hardware Interfaces === Base Layer Nodes MUST: * Support commodity CPU hardware * Support standard network interfaces * Support standard storage interfaces * Support consumer-grade memory Coordination Layer Nodes MUST: * Support specialized proof generation hardware * Support high-bandwidth network interfaces * Support high-performance storage * Support sufficient memory for proof generation Zone Nodes MAY: * Require specialized hardware * Support custom networking hardware * Implement specific storage requirements * Need high-performance memory <span id="software-interfaces"></span> === 3.3 Software Interfaces === The system MUST provide: # Network Protocol Interfaces * P2P networking modules, i.e. libp2p-mix (for network privacy) * Blend Network modules: ** PTM (validator connections and drop messages) ** MBM (consensus message mixing and timing) ** CTM (cover traffic generation) * Data availability protocols * Cross-zone communication protocols # Cryptographic Interfaces * Zero-knowledge proof systems * Threshold encryption systems * Key management systems * Commitment schemes # Storage Interfaces * Data availability storage * State storage * Proof storage * Configuration storage # Development Interfaces * Zone development frameworks * Smart contract languages * Privacy-preserving computation tools * Cross-zone communication libraries <span id="communications-interfaces"></span> === 3.4 Communications Interfaces === The system MUST implement: # Network-Level Communication * Privacy-preserving P2P protocols through libp2p-mix module * Consensus privacy as Blend Network protocol * Data availability sampling * Consensus communication as Cryptarchia # Cross-Zone Communication * Trust-minimized bridging * Message passing protocols * State verification * Atomic operations # Light Node Communication * Data availability verification * Proof verification * Network coordination * Exit protocols <span id="system-features"></span> == 4. System Features == <span id="base-layer"></span> === 4.1 Base Layer === <span id="private-proof-of-stake"></span> ==== 4.1.1 Private Proof of Stake ==== Description: The Base Layer MUST implement a Private Proof of Stake consensus mechanism that preserves validator privacy and prevents targeted attacks. Functional Requirements: PPOS-001: Validator Privacy * The system MUST implement basic privacy: ** Hide validator stakes through Blend Network ** Preserve block proposer anonymity ** Prevent stake deanonymization attacks ** Maintain validator metadata privacy * The system SHOULD support enhanced privacy: ** Advanced timing analysis protection ** Enhanced anonymity set generation ** Improved network attack resistance PPOS-002: Consensus Security * The system MUST provide basic security: ** Prevent stake grinding attacks ** Ensure fair block production ** Maintain consensus finality ** Handle network partitions * The system SHOULD implement advanced security: ** Quantum attack resistance ** Eclipse attack prevention ** Advanced fork choice rules ** Complex partition handling PPOS-003: Network Resilience * The system MUST ensure basic resilience: ** Support commodity hardware validators ** Handle intermittent connectivity ** Recover from network failures ** Maintain liveness under attack * The system SHOULD provide enhanced resilience: ** Advanced recovery mechanisms ** Dynamic attack mitigation ** Adaptive network topology ** Self-healing capabilities <span id="data-availability"></span> ==== 4.1.2 Data Availability ==== Description: The Base Layer MUST provide scalable data availability with light client verification capabilities. Functional Requirements: DAS-001: Data Sampling and Verification * The system MUST implement basic sampling: ** Efficient data availability sampling ** Light client verification support ** Sample size optimization ** Verification latency targets * The system SHOULD support advanced sampling: ** Adaptive sample sizes ** Enhanced verification methods ** Optimized proof generation ** Advanced fraud proofs DAS-002: Data Organization * The system MUST implement basic sharding: ** Data segmentation and distribution ** Cross-shard verification ** Shard synchronization ** Data redundancy management * The system SHOULD support advanced sharding: ** Dynamic shard allocation ** Cross-shard optimization ** Adaptive redundancy ** Load balancing DAS-003: Data Integrity and Recovery * The system MUST ensure basic integrity: ** Data reconstruction capabilities ** Integrity verification ** Error detection and correction ** Bandwidth optimization * The system SHOULD implement advanced features: ** Advanced reconstruction methods ** Enhanced error correction ** Optimized bandwidth usage ** Proactive integrity checks <span id="network-and-consensus-privacy"></span> ==== 4.1.3 Network and Consensus Privacy ==== Description: The Base Layer MUST implement two complementary privacy systems: * Required for MVP: ** Nomos Blend Network: A specialized privacy system for Private Proof of Stake with three modules: *** PTM (Persistent Transmission Module): Manages validator connections and drop messages *** MBM (Message Blending Module): Processes consensus messages through mixing and timing obfuscation *** CTM (Cover Traffic Module): Generates anonymity sets through cover messages ** libp2p-mix: A P2P networking module for general network privacy * Future Enhancements: ** Advanced timing analysis protection ** Enhanced anonymity set generation ** Improved network attack resistance Functional Requirements: BNP-001: Persistent Transmission Module * The system MUST maintain persistent validator connections with basic privacy: ** Establish and maintain secure validator connections ** Handle drop messages for connection privacy ** Monitor connection quality and health ** Manage connection lifecycles securely * The system SHOULD implement advanced connection features: ** Dynamic connection management based on network conditions ** Enhanced privacy through adaptive drop message rates ** Advanced connection health monitoring and recovery ** Optimized connection resource management BNP-002: Message Blending Module * The system MUST process and blend consensus messages: ** Process consensus messages through mixing ** Implement basic timing analysis protection ** Integrate fully with Cryptarchia protocol ** Maintain message timing obfuscation * The system SHOULD enhance message privacy: ** Advanced timing analysis protection mechanisms ** Enhanced message mixing algorithms ** Complex timing pattern obfuscation ** Optimized message processing and blending BNP-003: Cover Traffic Module * The system MUST generate minimum required cover traffic: ** Generate and maintain cover message streams ** Create sufficient anonymity sets ** Optimize resource usage for cover traffic ** Balance privacy and bandwidth usage * The system SHOULD implement advanced cover traffic: ** Dynamic cover traffic generation based on network activity ** Enhanced anonymity set management ** Advanced traffic pattern obfuscation ** Efficient resource utilization strategies BNP-004: Network Privacy Integration * The system MUST provide network-level privacy: ** Network-level privacy for non-consensus messages ** Basic private P2P communication capabilities ** Private data dissemination mechanisms ** Basic traffic analysis protection * The system SHOULD enhance network privacy: ** Advanced traffic analysis protection ** Optimized cover traffic generation ** Larger anonymity set maintenance ** Improved network attack resistance <span id="coordination-layer"></span> === 4.2 Coordination Layer === <span id="zero-knowledge-verification"></span> ==== 4.2.1 Zero-Knowledge Verification ==== Description: The Coordination Layer MUST provide efficient zero-knowledge proof verification for state transitions and cross-zone communication. Functional Requirements: ZKV-001: Proof Verification Core * The system MUST implement basic verification: ** Efficient ZK proof verification ** Support for multiple proving systems ** Basic proof validity checks ** Verification cost optimization * The system SHOULD support advanced verification: ** Hardware-accelerated verification ** Parallel proof verification ** Advanced validity checks ** Dynamic cost optimization ZKV-002: Proof Aggregation * The system MUST support basic aggregation: ** Proof batching and combining ** Cross-zone proof aggregation ** Aggregation validity checks ** Resource usage optimization * The system SHOULD implement advanced aggregation: ** Dynamic batch sizing ** Multi-layer aggregation ** Complex validity preservation ** Enhanced resource efficiency ZKV-003: System Evolution * The system MUST handle basic updates: ** Proof system upgrades ** Parameter updates ** Backward compatibility ** Version management * The system SHOULD support advanced features: ** Zero-downtime upgrades ** Seamless version transitions ** Cross-version compatibility ** Update verification guarantees <span id="intent-solving"></span> ==== 4.2.2 Intent Solving ==== Description: The Coordination Layer MUST provide private intent matching and solving capabilities that preserve user privacy while enabling efficient cross-zone transaction processing. Functional Requirements: ISM-001: Intent Matching Core * The system MUST implement basic matching: ** Match compatible intents efficiently ** Ensure atomic execution across zones ** Handle partial transactions ** Support different intent types * The system SHOULD support advanced matching: ** Dynamic matching optimization ** Complex intent compatibility rules ** Multi-party intent matching ** Resource-aware matching ISM-002: Intent Privacy * The system SHOULD provide basic privacy: ** Basic intent privacy during matching ** Simple relationship hiding ** Minimal information disclosure ** Privacy-preserving validation * The system SHOULD implement enhanced privacy: ** Advanced intent obfuscation ** Complex relationship hiding ** Zero-knowledge intent matching ** Privacy-preserving optimization ISM-003: Cross-Zone Coordination * The system MUST enable basic coordination: ** Cross-zone atomic execution ** Basic state synchronization ** Intent propagation ** Failure handling * The system SHOULD support advanced features: ** Complex atomic operations ** Advanced state management ** Optimized propagation ** Comprehensive failure recovery <span id="zones"></span> === 4.3 Zones === <span id="execution-environments"></span> ==== 4.3.1 Execution Environments ==== Description: Zones MUST provide flexible and sovereign execution environments with configurable security and performance characteristics. Functional Requirements: ZEE-001: Virtual Machine Support * The system MUST provide support VM capabilities * The system SHOULD enable VM extensibility: ** Zero-knowledge virtual machine integration ** Multi-party computation environments ** Hardware-accelerated execution environments ** Domain-specific VM optimization ZEE-002: Consensus and State Management * The system MUST enable sovereign execution: ** Independent consensus mechanism selection ** State transition rule customization ** Cross-zone state verification ** State sovereignty preservation * The system SHOULD support execution evolution: ** Consensus mechanism upgrades ** State transition rule modifications ** Cross-zone state synchronization ** State recovery mechanisms ZEE-003: Privacy and Scalability * The system MUST implement execution privacy: ** Private state transitions ** Confidential smart contracts ** Selective state disclosure ** Private cross-zone interactions * The system SHOULD enable execution scaling: ** Parallel transaction processing ** State sharding capabilities ** Cross-zone execution optimization ** Resource utilization management <span id="network-privacy"></span> ==== 4.4 Network Privacy ==== Description: The system MUST implement comprehensive network-level privacy through libp2p-mix and Blend Network protocols to prevent traffic analysis and protect validator identities. Functional Requirements: NWP-001: Network Communication Privacy * The system MUST implement private P2P communication: ** Encrypted peer connections through libp2p-mix ** Private peer discovery mechanisms ** Network topology obfuscation ** Traffic pattern hiding * The system SHOULD enhance network privacy: ** Dynamic peer selection strategies ** Advanced routing algorithms ** Network partition resistance ** Topology optimization NWP-002: Traffic Analysis Protection * The system MUST prevent traffic analysis: ** Message size normalization ** Timing pattern obfuscation ** Flow correlation prevention ** Cover traffic integration * The system SHOULD implement enhanced protections: ** Adaptive traffic shaping ** Dynamic cover traffic generation ** Advanced timing obfuscation ** Flow fingerprint resistance NWP-003: Network Resilience * The system MUST provide network resilience: ** Peer connection redundancy ** Network attack resistance ** Failure recovery mechanisms ** Byzantine fault tolerance * The system SHOULD enable advanced resilience: ** Self-healing network topology ** Dynamic route optimization ** Attack mitigation strategies ** Automated recovery procedures <span id="cross-zone-communication"></span> === 4.5 Cross-Zone Communication === Description: The system MUST provide secure and private cross-zone communication through two complementary mechanisms: * Trust-minimized bridging through the Coordination Layer for verifiable state transitions * Direct message passing between zones with Base Layer fallback for data availability Functional Requirements: CZC-001: Trust-Minimized Bridging * The system MUST implement bridging through Coordination Layer: ** Zero-knowledge state transition verification ** Cross-zone transaction atomicity ** State commitment verification ** Bridge security guarantees ** Atomic intent execution * The system SHOULD support bridge evolution: ** Multi-zone atomic operations ** Optimized proof generation ** Enhanced bridge security ** Efficient state verification ** Advanced bridging protocols CZC-002: Message Passing Protocol * The system MUST enable direct zone communication: ** Reliable message delivery guarantees ** Base Layer fallback mechanisms ** Message ordering preservation ** Communication failure recovery ** State synchronization protocols * The system SHOULD enhance messaging capabilities: ** Optimized message routing ** Advanced failure detection ** Efficient state synchronization ** Resource-aware communication ** Dynamic routing optimization CZC-003: Privacy Preservation * The system MUST protect cross-zone privacy: ** Transaction source/destination hiding ** State transition confidentiality ** Relationship metadata protection ** Communication pattern obfuscation ** Intent privacy preservation * The system SHOULD implement privacy enhancements: ** Zero-knowledge message passing ** Enhanced metadata protection ** Advanced pattern hiding ** Cross-zone anonymity sets ** Relationship hiding protocols <span id="light-node-network"></span> === 4.6 Light Node Network === Description: The Light Node Network MUST provide efficient verification capabilities while minimizing resource requirements, enabling users to validate the network’s integrity without running full nodes. Functional Requirements: LNV-001: Data Availability Verification * The system MUST enable light client verification: ** Data availability sampling verification ** Fraud proof validation ** Sample size management ** Bandwidth-efficient verification ** Resource usage optimization * The system SHOULD support verification enhancements: ** Adaptive sampling strategies ** Optimized proof validation ** Enhanced fraud detection ** Network-aware sampling ** Dynamic sample size adjustment LNV-002: Zero-Knowledge Proof Validation * The system MUST support proof verification: ** Zone state transition validation ** Cross-zone communication verification ** Selective proof verification ** Resource-efficient validation ** Proof aggregation verification * The system SHOULD enable advanced validation: ** Parallel proof verification ** Proof aggregation validation ** Optimized verification paths ** Hardware acceleration support ** Batched proof verification LNV-003: Network Security * The system MUST provide security features: ** Secure network exit protocol implementation ** Verifiable data reconstruction mechanisms ** Decentralized coordination protocol ** Byzantine fault detection ** Network partition handling * The system SHOULD enable advanced security: ** Automated exit coordination ** Enhanced data reconstruction ** Advanced fault detection ** Network attack resistance ** Self-healing mechanisms <span id="other-nonfunctional-requirements"></span> == 5. Other Nonfunctional Requirements == <span id="performance-requirements"></span> === 5.1 Performance Requirements === # Base Layer Performance * MUST support at least 10,000 validators * MUST process at least 1000 transactions per second * MUST maintain block times under 2 seconds * MUST support home internet bandwidth limits * SHOULD optimize proof verification costs * SHOULD minimize state growth # Coordination Layer Performance * MUST verify proofs within 100ms * MUST handle proof aggregation efficiently * MUST support parallel proof generation * MUST optimize cross-zone communication * SHOULD minimize proof sizes * SHOULD optimize intent matching # Zone Performance * MUST support custom performance requirements * MUST handle state transitions efficiently * MUST optimize cross-zone operations * MUST support parallel execution * SHOULD enable horizontal scaling * SHOULD minimize resource usage <span id="security-requirements"></span> === 5.2 Security Requirements === # Required Network Security (MVP) * MUST prevent stake deanonymization through Blend Network * MUST prevent traffic analysis through libp2p-mix * MUST ensure message privacy for consensus * MUST prevent targeted attacks on validators * MUST protect against basic network attacks # Required Cryptographic Security (MVP) * MUST use proven cryptographic primitives * MUST ensure proof soundness for state verification * MUST protect private keys and validator identities * MUST implement secure message mixing * MUST ensure atomic cross-zone operations # Required Protocol Security (MVP) * MUST prevent double spending * MUST ensure consensus safety * MUST handle byzantine behavior * MUST protect against grinding attacks * MUST maintain validator anonymity # Enhanced Security (Future) * SHOULD resist quantum attacks * SHOULD prevent eclipse attacks * SHOULD support key rotation * SHOULD implement forward secrecy * SHOULD prevent MEV extraction * SHOULD handle network partitions * SHOULD enhance intent privacy * SHOULD protect relationship metadata <span id="software-quality-attributes"></span> === 5.3 Software Quality Attributes === # Reliability * MUST maintain network availability * MUST ensure data persistence * MUST handle node failures * MUST recover from errors * SHOULD provide redundancy * SHOULD implement fault tolerance # Maintainability * MUST support protocol upgrades * MUST enable bug fixes * MUST allow parameter updates * MUST support backwards compatibility * SHOULD enable modular updates * SHOULD minimize upgrade complexity # Usability * MUST provide clear interfaces * MUST support easy deployment * MUST enable simple configuration * MUST handle errors gracefully * SHOULD provide helpful documentation * SHOULD implement intuitive APIs <span id="business-rules"></span> === 5.4 Business Rules === # Tokenomics * MUST implement fair token distribution * MUST provide validator incentives * MUST handle transaction fees * MUST support restaking * SHOULD prevent stake centralization * SHOULD optimize economic security # Governance * MUST enable protocol upgrades * MUST support parameter changes * MUST handle disputes * MUST enable coordination * SHOULD support decentralized governance * SHOULD enable stake-weighted voting <span id="other-requirements"></span> == 6. Other Requirements == # Legal Requirements * MUST comply with privacy regulations * MUST handle data protection * MUST support regulatory compliance * MUST enable selective disclosure * SHOULD support identity verification * SHOULD enable compliance reporting # Internationalization * MUST support multiple languages * MUST handle different timezones * MUST support various regions * MUST enable local customization * SHOULD support cultural differences * SHOULD handle different regulations <span id="appendix-a-glossary"></span> == Appendix A: Glossary == * ''Base Layer (BL)'': The foundational layer providing consensus and data availability * ''Blend Network'': A specialized privacy system for Private Proof of Stake consisting of: ** ''PTM (Persistent Transmission Module)'': Manages validator connections and drop messages ** ''MBM (Message Blending Module)'': Processes consensus messages through mixing and timing obfuscation ** ''CTM (Cover Traffic Module)'': Generates anonymity sets through cover messages * ''Coordination Layer (CL)'': The layer handling proof verification and cross-zone communication * ''Cryptarchia'': A consensus protocol that works with Blend Network to implement Private Proof of Stake * ''Data Availability Sampling'': A technique for efficient data verification * ''Intent'': A high-level description of desired transaction outcomes * ''libp2p-mix'': A P2P networking module providing general network-level privacy * ''Light Node'': A resource-efficient node for network verification * ''Private Proof of Stake'': A privacy-preserving consensus mechanism implemented through Blend Network and Cryptarchia * ''Zero-Knowledge Proof'': A cryptographic method for verifying computations * ''Zone'': An independent execution environment with sovereign state * ''Cross-Zone Communication'': Interaction between different execution environments <span id="appendix-b-analysis-models"></span> == Appendix B: Analysis Models == # Network Architecture * Base Layer topology * Coordination Layer structure * Zone relationships * Communication paths # Protocol Flows * Consensus process * Proof verification * Cross-zone operations * Light node verification # Security Models * Threat models * Attack vectors * Defense mechanisms * Privacy guarantees <span id="appendix-c-to-be-determined-list"></span> == Appendix C: To Be Determined List == # Base Layer * Optimal sharding parameters * Stake inference mechanisms * Network scaling limits * Upgrade mechanisms # Coordination Layer * Proof aggregation schemes * Intent matching algorithms * Cross-zone protocols * Verification optimization # Zones * Execution model standards * Privacy technology integration * State transition schemes * Communication protocols # General * Governance mechanisms * Economic parameters * Upgrade procedures
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