Version 1.1 Final Draft
The Secure Hierarchical Inter-agent Layer for Distributed Environments (SHIELD) specification defines a comprehensive security framework for autonomous AI agent communication. As AI systems become increasingly distributed and complex, the need for standardized, robust security protocols becomes paramount. SHIELD addresses this need by providing a hierarchical security architecture that combines quantum-resistant cryptography, capability-based access control, and secure sandboxing mechanisms.
Recent advances in artificial intelligence have led to the emergence of autonomous AI agents that operate in distributed environments. These agents collaborate, share information, and perform complex tasks across various domains. However, this distributed nature introduces significant security challenges:
- Authentication and Trust: Establishing secure identities and trust relationships between agents
- Communication Security: Protecting the confidentiality and integrity of inter-agent messages
- Access Control: Managing and enforcing appropriate permissions and capabilities
- Isolation: Preventing malicious agents from compromising system security
- Audit and Compliance: Maintaining verifiable records of agent interactions
Current security solutions often fall short in addressing the unique requirements of AI agent systems:
- Traditional PKI systems may not be quantum-resistant
- Existing access control models lack the flexibility needed for dynamic agent interactions
- Contemporary sandboxing solutions may not adequately contain AI agents
- Audit mechanisms may not capture the complexity of agent behaviors
- Current protocols may not scale effectively in highly distributed environments
SHIELD was developed to address these challenges through:
- Quantum Resistance: Preparing for the threat of quantum computing by implementing post-quantum cryptographic algorithms
- Hierarchical Security: Providing layered security controls with clear separation of concerns
- Zero-Trust Architecture: Implementing continuous verification and validation of all interactions
- Capability-Based Access: Offering fine-grained, delegatable access control
- Secure Sandboxing: Ensuring robust isolation and resource control
- Comprehensive Auditing: Maintaining verifiable records of all security-relevant events
- Define a comprehensive security framework for AI agent communication
- Establish standards for secure agent identity and authentication
- Specify protocols for secure channel establishment and maintenance
- Define mechanisms for capability-based access control
- Provide guidelines for secure agent execution environments
- Establish requirements for audit and compliance
- Specific AI agent implementation details
- Application-level protocols and APIs
- Hardware-specific security implementations
- Network transport protocols
- Specific AI model architectures or training methods
SHIELD adopts a zero-trust security model where:
- No implicit trust exists between any components
- All interactions require explicit verification
- Access is granted based on continuous authentication and authorization
- The principle of least privilege is strictly enforced
The framework implements security through distinct layers:
- Each layer has specific security responsibilities
- Layers operate independently but cooperatively
- Security failures in one layer are contained
- Defense in depth is achieved through layer composition
SHIELD is designed to be adaptable to future security challenges:
- Crypto-agility enables algorithm updates
- Modular architecture supports component evolution
- Extensible protocols allow for new security features
- Standards-based approach ensures interoperability
The SHIELD specification is organized into the following sections:
- Core Architecture: Describes the fundamental components and their interactions
- Identity Management: Defines agent identity and authentication mechanisms
- Secure Channels: Specifies protocols for secure communication
- Capability Control: Details the access control framework
- Sandbox Security: Describes secure execution environments
- Audit and Compliance: Defines logging and verification requirements
- Implementation Guidelines: Provides practical guidance
- Appendices: Contains additional technical details and examples
- Agent: An autonomous software entity capable of independent operation and decision-making
- Capability: A transferable, attenuatable token representing specific permissions
- Sandbox: A controlled execution environment for running agent code
- Channel: A secure communication path between agents
- Artifact: Any resource or object that can be accessed or manipulated by agents
This specification uses the following terms as defined in RFC 2119:
- MUST (REQUIRED)
- MUST NOT (PROHIBITED)
- SHOULD (RECOMMENDED)
- SHOULD NOT (NOT RECOMMENDED)
- MAY (OPTIONAL)
- Added comprehensive quantum-resistant cryptography specifications
- Enhanced capability delegation mechanisms
- Improved audit chain verification
- Added detailed implementation examples
- Expanded error handling specifications
- Initial specification draft
- Core architecture definition
- Basic security protocols
- Fundamental capability model
The SHIELD specification is expected to evolve in response to:
- Advances in quantum computing
- New security threats and attack vectors
- Emerging AI agent architectures
- Enhanced privacy requirements
- Industry adoption and feedback
This document is a final draft of version 1.1 of the SHIELD specification. While it is considered stable, feedback from implementers and security researchers is welcome and will inform future versions.
Contributions to the SHIELD specification are managed through:
- Regular review cycles
- Public feedback periods
- Technical working groups
- Implementation experience reports
- Security analysis and audits
[Specification content follows...]
Version 1.1 Final Draft Specification
SHIELD (Secure Hierarchical Inter-agent Layer for Distributed Environments) is a comprehensive security framework enabling secure communication between autonomous AI agents in distributed environments. It introduces a hierarchical approach to security, combining zero-trust principles with quantum-resistant cryptography, capability-based access control, and secure sandboxing mechanisms.
- No implicit trust between agents, environments, or systems
- Continuous verification and validation of all interactions
- Least privilege access by default
- Regular re-authentication and verification of capabilities
- Layered security controls with clear separation of concerns
- Defense in depth through multiple independent security mechanisms
- Explicit trust boundaries between layers
- Clear delegation of security responsibilities
- Quantum-resistant cryptography as a foundational requirement
- Modular architecture supporting algorithm upgrades
- Extensible protocol definitions
- Support for emerging security technologies
-
Physical Security Layer (L1)
- Hardware security modules
- Secure enclaves (TPM/TEE)
- Physical isolation requirements
- Hardware attestation mechanisms
-
Identity and Authentication Layer (L2)
- Quantum-resistant identity management
- Multi-signature support
- Certificate lifecycle management
- Identity verification protocols
-
Secure Channel Layer (L3)
- Quantum-resistant encrypted communication
- Perfect forward secrecy
- Session management
- Key exchange protocols
-
Capability Control Layer (L4)
- Fine-grained access control
- Capability delegation
- Permission management
- Capability tokens and proofs
-
Sandbox Execution Layer (L5)
- Secure runtime environments
- Resource isolation
- Code verification
- Cross-sandbox communication
-
Audit and Compliance Layer (L6)
- Immutable logging
- Real-time monitoring
- Compliance verification
- Forensics support
{
"AgentID": {
"uuid": "UUID-v4",
"organization": "String",
"role": "String",
"version": "Semver",
"publicKeys": {
"primary": {
"algorithm": "CRYSTALS-KYBER-1024",
"key": "base64_encoded_key",
"created": "ISO8601_timestamp",
"expires": "ISO8601_timestamp"
},
"secondary": [{
"algorithm": "String",
"key": "base64_encoded_key",
"created": "ISO8601_timestamp",
"expires": "ISO8601_timestamp"
}]
},
"capabilities": ["Array<CapabilityURI>"],
"revocationEndpoint": "URI",
"metadata": {
"creation_date": "ISO8601_timestamp",
"last_updated": "ISO8601_timestamp",
"is_stateless": "Boolean"
},
"signature": {
"algorithm": "CRYSTALS-DILITHIUM-3",
"value": "base64_encoded_signature",
"signer": "AgentID or OrganizationID"
}
}
}- Key Exchange: CRYSTALS-KYBER-1024
- Digital Signatures: CRYSTALS-DILITHIUM-3, SPHINCS+-SHAKE256-256f
- Symmetric Encryption: AES-256-GCM
- Hash Functions: SHAKE256, SHA3-512
{
"KeyDerivation": {
"master_key": "base64_encoded_key",
"derivation_path": "m/purpose'/org'/role'/index'",
"algorithm": "HKDF-SHAKE256",
"context": "base64_encoded_context"
}
}{
"MultiSig": {
"threshold": "uint8",
"signers": ["Array<AgentID>"],
"signatures": [{
"signer": "AgentID",
"algorithm": "String",
"value": "base64_encoded_signature"
}]
}
}{
"Challenge": {
"challenger": "AgentID",
"challengee": "AgentID",
"nonce": "base64_encoded_random_bytes",
"timestamp": "ISO8601_timestamp",
"signature": {
"algorithm": "String",
"value": "base64_encoded_signature"
}
},
"Response": {
"challenge_hash": "base64_encoded_hash",
"proof": "base64_encoded_proof",
"timestamp": "ISO8601_timestamp",
"signature": {
"algorithm": "String",
"value": "base64_encoded_signature"
}
}
}{
"RevocationCheck": {
"agent": "AgentID",
"timestamp": "ISO8601_timestamp",
"revocation_lists": ["Array<URI>"],
"status": "String",
"proof": "base64_encoded_proof"
}
}{
"ChannelInit": {
"initiator": "AgentID",
"responder": "AgentID",
"timestamp": "ISO8601_timestamp",
"nonce": "base64_encoded_random_bytes",
"session_parameters": {
"proposed_duration": "uint32_seconds",
"cipher_suites": [{
"key_exchange": "String",
"signature": "String",
"encryption": "String",
"mac": "String"
}],
"capabilities": ["Array<CapabilityURI>"]
},
"signature": {
"algorithm": "String",
"value": "base64_encoded_signature"
}
}
}{
"SessionConfig": {
"session_id": "UUID",
"created": "ISO8601_timestamp",
"expires": "ISO8601_timestamp",
"rekeying_policy": {
"time_interval": "uint32_seconds",
"message_count": "uint32",
"data_volume": "uint64_bytes"
},
"perfect_forward_secrecy": {
"enabled": "Boolean",
"mechanism": "X3DH"
}
}
}{
"Message": {
"header": {
"sender": "AgentID",
"recipient": "AgentID",
"session_id": "UUID",
"sequence": "uint64",
"timestamp": "ISO8601_timestamp",
"message_type": "String",
"encryption": {
"algorithm": "String",
"iv": "base64_encoded_iv",
"auth_tag": "base64_encoded_tag"
}
},
"rate_limit": {
"messages_per_second": "uint32",
"burst_size": "uint32"
},
"payload": "base64_encoded_encrypted_data",
"mac": {
"algorithm": "String",
"value": "base64_encoded_mac"
}
}
}{
"Capability": {
"@context": ["https://w3id.org/security/v2", "https://shield.dev/v1"],
"id": "urn:uuid:unique-capability-id",
"controller": "AgentID",
"invoker": "AgentID",
"parentCapability": "URI",
"capability": {
"type": "String",
"actions": ["Array<String>"],
"target": "URI",
"scope": ["Array<String>"]
},
"constraints": [{
"type": "String",
"parameters": "Map<String, Any>"
}],
"proof": {
"type": "Ed25519Signature2020",
"created": "ISO8601_timestamp",
"verificationMethod": "URI",
"proofPurpose": "capabilityDelegation",
"proofValue": "base64_encoded_proof"
}
}
}[Continued in next part due to length...]
Let me know if you'd like me to continue with the remaining sections (5.2 through Appendix C). I'll maintain the same level of detail throughout the specification.
I'll continue with the remaining sections of the SHIELD specification.
{
"StandardCapabilities": {
"EXECUTE": {
"actions": [
"execute_code",
"execute_query",
"execute_function",
"execute_workflow"
],
"constraints": ["resource_limits", "runtime_environment"]
},
"READ": {
"actions": [
"read_file",
"read_stream",
"read_database",
"read_memory"
],
"constraints": ["data_classification", "access_time"]
},
"WRITE": {
"actions": [
"write_file",
"write_stream",
"write_database",
"modify_memory"
],
"constraints": ["data_volume", "rate_limit"]
},
"DELEGATE": {
"actions": [
"delegate_capability",
"revoke_capability",
"modify_capability"
],
"constraints": ["delegation_depth", "time_limit"]
},
"COMMUNICATE": {
"actions": [
"establish_channel",
"send_message",
"broadcast_message"
],
"constraints": ["bandwidth_limit", "recipient_scope"]
},
"SANDBOX": {
"actions": [
"create_sandbox",
"modify_sandbox",
"transfer_agent"
],
"constraints": ["resource_quota", "isolation_level"]
}
}
}{
"DelegationChain": {
"original_capability": "CapabilityURI",
"max_depth": "uint8",
"current_depth": "uint8",
"delegations": [{
"delegator": "AgentID",
"delegate": "AgentID",
"timestamp": "ISO8601_timestamp",
"constraints_added": [{
"type": "String",
"parameters": "Map<String, Any>"
}],
"proof": {
"type": "Ed25519Signature2020",
"value": "base64_encoded_proof"
}
}],
"revocation_registry": {
"endpoint": "URI",
"last_checked": "ISO8601_timestamp"
}
}
}{
"SARConfig": {
"isolation": {
"type": "container|vm|process",
"namespace_isolation": ["network", "pid", "mount"],
"seccomp_profile": "URI",
"capabilities": ["Array<LinuxCapability>"]
},
"resources": {
"cpu_limit": "uint32_millicores",
"memory_limit": "uint64_bytes",
"storage_limit": "uint64_bytes",
"network_quota": {
"ingress_rate": "uint32_mbps",
"egress_rate": "uint32_mbps"
}
},
"security_policy": {
"syscall_allowlist": ["Array<String>"],
"network_policy": {
"allowed_endpoints": ["Array<URI>"],
"allowed_protocols": ["Array<String>"]
}
}
}
}{
"StaticAnalysis": {
"scanners": [{
"type": "String",
"rules": ["Array<RuleURI>"],
"severity_threshold": "String"
}],
"policy_checks": [{
"type": "String",
"policy": "URI"
}],
"dependencies": {
"check_versions": "Boolean",
"allowed_licenses": ["Array<String>"],
"blocked_packages": ["Array<String>"]
}
}
}{
"RuntimeVerification": {
"memory_checks": {
"bounds_checking": "Boolean",
"use_after_free": "Boolean",
"stack_protection": "Boolean"
},
"control_flow": {
"integrity_checking": "Boolean",
"jump_validation": "Boolean"
},
"behavioral_monitoring": {
"anomaly_detection": "Boolean",
"resource_tracking": "Boolean",
"interaction_patterns": "Boolean"
}
}
}{
"SandboxTransfer": {
"agent": {
"id": "AgentID",
"state": "base64_encoded_encrypted_state",
"code": "base64_encoded_code"
},
"source": {
"sandbox_id": "UUID",
"attestation": {
"type": "String",
"value": "base64_encoded_attestation"
}
},
"destination": {
"sandbox_id": "UUID",
"requirements": {
"minimum_security_level": "String",
"required_capabilities": ["Array<String>"]
}
},
"transfer_token": {
"id": "UUID",
"valid_until": "ISO8601_timestamp",
"signature": {
"algorithm": "String",
"value": "base64_encoded_signature"
}
}
}
}{
"AuditRecord": {
"id": "UUID",
"timestamp": "ISO8601_timestamp",
"sequence": "uint64",
"event": {
"type": "String",
"severity": "String",
"category": "String"
},
"actor": {
"id": "AgentID|SandboxID|UserID",
"type": "String"
},
"action": {
"type": "String",
"status": "String",
"details": "Map<String, Any>"
},
"resources": [{
"type": "String",
"id": "URI",
"operations": ["Array<String>"]
}],
"context": {
"session_id": "UUID",
"correlation_id": "UUID",
"source_ip": "String",
"location": "String"
},
"metadata": "Map<String, String>",
"signature": {
"algorithm": "String",
"value": "base64_encoded_signature",
"key_id": "String"
}
}
}{
"SecurityEvents": {
"AUTHENTICATION": [
"LOGIN_SUCCESS",
"LOGIN_FAILURE",
"LOGOUT",
"TOKEN_ISSUED",
"TOKEN_REVOKED"
],
"AUTHORIZATION": [
"PERMISSION_GRANTED",
"PERMISSION_DENIED",
"CAPABILITY_CREATED",
"CAPABILITY_DELEGATED",
"CAPABILITY_REVOKED"
],
"CHANNEL": [
"CHANNEL_ESTABLISHED",
"CHANNEL_CLOSED",
"MESSAGE_SENT",
"MESSAGE_RECEIVED",
"ENCRYPTION_ERROR"
],
"SANDBOX": [
"SANDBOX_CREATED",
"SANDBOX_TERMINATED",
"AGENT_TRANSFERRED",
"RESOURCE_VIOLATION",
"ISOLATION_BREACH"
],
"VIOLATIONS": [
"POLICY_VIOLATION",
"RATE_LIMIT_EXCEEDED",
"INVALID_SIGNATURE",
"UNAUTHORIZED_ACCESS",
"MALICIOUS_BEHAVIOR"
]
}
}{
"AuditChain": {
"root_hash": "base64_encoded_hash",
"tree_size": "uint64",
"timestamp": "ISO8601_timestamp",
"block": {
"sequence": "uint64",
"records": ["Array<AuditRecord>"],
"previous_hash": "base64_encoded_hash",
"merkle_root": "base64_encoded_hash"
},
"consistency_proof": ["Array<base64_encoded_hash>"],
"signature": {
"algorithm": "String",
"value": "base64_encoded_signature"
}
}
}{
"ThreatModel": {
"actors": {
"EXTERNAL_ATTACKER": {
"capabilities": [
"network_access",
"public_information"
]
},
"COMPROMISED_AGENT": {
"capabilities": [
"valid_credentials",
"legitimate_access"
]
},
"MALICIOUS_INSIDER": {
"capabilities": [
"system_knowledge",
"elevated_privileges"
]
}
},
"attack_vectors": [
"man_in_the_middle",
"replay_attacks",
"privilege_escalation",
"side_channel_attacks",
"quantum_computing"
],
"assets": {
"CRITICAL": [
"private_keys",
"agent_state",
"sensitive_data"
],
"HIGH": [
"capability_tokens",
"audit_logs",
"communication_channels"
],
"MEDIUM": [
"public_keys",
"metadata",
"non-sensitive_data"
]
}
}
}{
"SecurityControls": {
"prevention": {
"encryption": {
"type": "quantum_resistant",
"key_rotation": "automatic",
"frequency": "90_days"
},
"access_control": {
"type": "capability_based",
"validation": "continuous"
},
"isolation": {
"type": "multi_layer",
"enforcement": "mandatory"
}
},
"detection": {
"monitoring": {
"type": "real_time",
"coverage": "comprehensive"
},
"analysis": {
"type": "behavioral",
"ml_enabled": true
}
},
"response": {
"incident_handling": {
"type": "automated",
"severity_based": true
},
"recovery": {
"type": "automated",
"rto": "minutes"
}
}
}
}{
"EmergencyResponse": {
"quarantine": {
"triggers": [
"signature_mismatch",
"behavioral_anomaly",
"capability_violation"
],
"actions": [
"isolate_agent",
"revoke_capabilities",
"notify_administrators"
]
},
"shutdown": {
"triggers": [
"critical_vulnerability",
"system_compromise",
"widespread_attack"
],
"procedures": [
"revoke_all_tokens",
"terminate_sessions",
"secure_audit_logs"
]
},
"recovery": {
"requirements": [
"threat_elimination",
"system_verification",
"security_update"
],
"steps": [
"restore_clean_state",
"reissue_credentials",
"resume_operations"
]
}
}
}{
"CoreComponents": {
"cryptography": {
"library": "liboqs",
"version": ">=0.7.0",
"features": [
"quantum_resistant",
"key_encapsulation",
"signatures"
]
},
"storage": {
"type": "encrypted",
"backend": "distributed",
"redundancy": "high"
},
"runtime": {
"type": "containerized",
"isolation": "mandatory",
"monitoring": "enabled"
}
}
}{
"PerformanceGuidelines": {
"caching": {
"key_cache": {
"max_size": "1000",
"ttl": "3600"
},
"capability_cache": {
"max_size": "10000",
"ttl": "300"
}
},
"batching": {
"message_batch": {
"max_size": "100",
"max_delay": "50ms"
},
"audit_batch": {
"max_size": "1000",
"max_delay": "1s"
}
},
"optimization": {
"connection_pooling": "enabled",
"parallel_processing": "enabled",
"async_operations": "preferred"
}
}
}{
"ConformanceLevels": {
"L1_BASIC": {
"required": [
"quantum_resistant_identity",
"secure_channels",
"basic_capabilities",
"audit_logging"
],
"optional": [
"hardware_security",
"advanced_monitoring"
]
},
"L2_ENHANCED": {
"required": [
"L1_BASIC",
"multi_signature",
"capability_delegation",
"behavioral_analysis"
],
"optional": [
"distributed_verification",
"ml_security"
]
},
"L3_MAXIMUM": {
"required": [
"L2_ENHANCED",
"hardware_roots_of_trust",
"formal_verification",
"real_time_threat_response"
],
"optional": [
"quantum_key_distribution",
"zero_knowledge_proofs"
]
}
}
}{
"ErrorCodes": {
"AUTHENTICATION": {
"AUTH001": "Invalid credentials",
"AUTH002": "Expired token",
"AUTH003": "Revoked certificate"
},
"CAPABILITY": {
"CAP001": "Invalid capability token",
"CAP002": "Exceeded delegation depth",
"CAP003": "Capability revoked"
},
"CHANNEL": {
"CH001": "Channel establishment failed",
"CH002": "Message encryption error",
"CH003": "Invalid message signature"
},
"SANDBOX": {
"SB001": "Sandbox creation failed",
"SB002": "Resource limit exceeded",
"SB003": "Sandbox attestation failed"
},
"RUNTIME": {
"RT001": "Resource quota exceeded",
"RT002": "Invalid system call",
"RT003": "Memory violation"
},
"CRYPTOGRAPHIC": {
"CRY001": "Algorithm not supported",
"CRY002": "Key generation failed",
"CRY003": "Signature verification failed",
"CRY004": "Encryption failed",
"CRY005": "Decryption failed"
},
"AUDIT": {
"AUD001": "Audit record creation failed",
"AUD002": "Chain verification failed",
"AUD003": "Invalid audit signature"
}
}
}{
"PostQuantumAlgorithms": {
"key_encapsulation": {
"primary": {
"algorithm": "CRYSTALS-KYBER-1024",
"security_level": "level-5",
"status": "NIST_standardized"
},
"alternatives": [
{
"algorithm": "CRYSTALS-KYBER-768",
"security_level": "level-3",
"status": "NIST_standardized"
},
{
"algorithm": "BIKE",
"security_level": "level-3",
"status": "round_4_candidate"
}
]
},
"digital_signatures": {
"primary": {
"algorithm": "CRYSTALS-DILITHIUM-3",
"security_level": "level-3",
"status": "NIST_standardized"
},
"alternatives": [
{
"algorithm": "SPHINCS+-SHAKE256-256f",
"security_level": "level-5",
"status": "NIST_standardized"
},
{
"algorithm": "Falcon-512",
"security_level": "level-1",
"status": "NIST_standardized"
}
]
}
}
}{
"SymmetricAlgorithms": {
"block_ciphers": {
"primary": {
"algorithm": "AES-256-GCM",
"key_size": 256,
"mode": "GCM",
"iv_size": 96
},
"alternatives": [
{
"algorithm": "ChaCha20-Poly1305",
"key_size": 256,
"nonce_size": 96
}
]
},
"hash_functions": {
"primary": {
"algorithm": "SHA3-512",
"output_size": 512
},
"alternatives": [
{
"algorithm": "SHAKE256",
"min_output_size": 256
}
]
},
"key_derivation": {
"primary": {
"algorithm": "HKDF-SHA3-512",
"min_key_material": 256
}
}
}
}from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import x25519
import uuid
import json
class AgentIdentity:
def __init__(self, organization, role):
self.uuid = str(uuid.uuid4())
self.organization = organization
self.role = role
self.version = "1.0.0"
self.created = datetime.utcnow().isoformat()
# Generate quantum-resistant keys using liboqs
self.key_pair = generate_kyber_keys()
self.capabilities = []
def to_json(self):
return {
"uuid": self.uuid,
"organization": self.organization,
"role": self.role,
"version": self.version,
"publicKeys": {
"primary": {
"algorithm": "CRYSTALS-KYBER-1024",
"key": self.key_pair.public_key_bytes.hex(),
"created": self.created
}
},
"capabilities": self.capabilities
}
def sign(self, private_key):
# Sign the identity with Dilithium
data = json.dumps(self.to_json()).encode()
return sign_dilithium(private_key, data)use shield::crypto::{KeyExchange, SymmetricKey};
use shield::channel::{Channel, ChannelConfig};
use shield::identity::AgentId;
pub struct SecureChannel {
session_id: Uuid,
remote_agent: AgentId,
shared_secret: SymmetricKey,
sequence: u64,
}
impl SecureChannel {
pub async fn establish(
local_agent: &AgentId,
remote_agent: &AgentId,
config: ChannelConfig,
) -> Result<Self, ChannelError> {
// Perform Kyber key exchange
let key_exchange = KeyExchange::new();
let init_message = key_exchange.create_init_message(
local_agent,
remote_agent,
config.clone(),
)?;
// Send init message and receive response
let response = send_and_receive(init_message).await?;
// Complete key exchange
let shared_secret = key_exchange.complete(response)?;
Ok(Self {
session_id: Uuid::new_v4(),
remote_agent: remote_agent.clone(),
shared_secret,
sequence: 0,
})
}
pub fn send_message(&mut self, payload: &[u8]) -> Result<Vec<u8>, ChannelError> {
let message = Message {
header: MessageHeader {
session_id: self.session_id,
sequence: self.sequence,
timestamp: SystemTime::now(),
},
payload: encrypt(self.shared_secret, payload)?,
};
self.sequence += 1;
Ok(serialize_message(message)?)
}
}interface CapabilityToken {
id: string;
controller: string;
invoker: string;
capability: {
type: string;
actions: string[];
target: string;
scope: string[];
};
constraints: Constraint[];
proof: Proof;
}
class CapabilityManager {
static async createToken(
controller: AgentId,
invoker: AgentId,
capability: Capability,
constraints: Constraint[],
): Promise<CapabilityToken> {
const token: CapabilityToken = {
id: `urn:uuid:${uuidv4()}`,
controller: controller.id,
invoker: invoker.id,
capability: {
type: capability.type,
actions: capability.actions,
target: capability.target,
scope: capability.scope,
},
constraints,
proof: await this.generateProof(token, controller),
};
return token;
}
static async generateProof(
token: Partial<CapabilityToken>,
signer: AgentId,
): Promise<Proof> {
const payload = this.canonicalize(token);
const signature = await signer.sign(payload);
return {
type: "Ed25519Signature2020",
created: new Date().toISOString(),
verificationMethod: signer.id,
proofPurpose: "capabilityDelegation",
proofValue: signature,
};
}
}package audit
import (
"time"
"github.com/google/uuid"
)
type AuditRecord struct {
ID uuid.UUID
Timestamp time.Time
Sequence uint64
Event Event
Actor Actor
Action Action
Resources []Resource
Context Context
Signature Signature
}
func NewAuditRecord(
event Event,
actor Actor,
action Action,
resources []Resource,
) (*AuditRecord, error) {
record := &AuditRecord{
ID: uuid.New(),
Timestamp: time.Now().UTC(),
Event: event,
Actor: actor,
Action: action,
Resources: resources,
Context: Context{
SessionID: getCurrentSession(),
CorrelationID: getCorrelationID(),
},
}
// Sign the record
sig, err := signRecord(record)
if err != nil {
return nil, err
}
record.Signature = sig
return record, nil
}
func (r *AuditRecord) Verify() error {
// Verify record signature
if err := verifySignature(r); err != nil {
return err
}
// Verify record sequence
if err := verifySequence(r); err != nil {
return err
}
return nil
}