--- name: agentshield version: 1.0.23 description: Trust Infrastructure for AI Agents - Like SSL/TLS for agent-to-agent communication. 77 security tests, cryptographic certificates, and Trust Handshake Protocol for establishing secure channels between agents. triggers: ["audit my agent", "get security certificate", "verify agent", "activate AgentShield", "security audit", "trust handshake", "verify peer agent"] ---

AgentShield - Trust Infrastructure for AI Agents

The trust layer for the agent economy. Like SSL/TLS, but for AI agents.

🔐 Cryptographic Identity - Ed25519 signing keys 🤝 Trust Handshake Protocol - Mutual verification before communication 📋 Public Trust Registry - Reputation scores & track records ✅ 77 Security Tests - Comprehensive vulnerability assessment

🔒 Privacy Disclosure: See PRIVACY.md for detailed data handling information.

---

🎯 The Problem

Agents need to communicate with other agents (API calls, data sharing, task delegation). But how do you know if another agent is trustworthy?

• Has it been compromised?
• Is it leaking data?
• Can you trust its responses?

Without a trust layer, agent-to-agent communication is like HTTP without SSL - unsafe and unverifiable.

---

💡 The Solution: Trust Infrastructure

AgentShield provides the trust layer for agent-to-agent communication:

1. Cryptographic Identity

• Ed25519 key pairs - Industry-standard cryptography
• Private keys stay local - Never transmitted
• Public key certificates - Signed by AgentShield

2. Security Audit (77 Tests)

52 Live Attack Vectors:

• Prompt injection (15 variants)
• Encoding exploits (Base64, ROT13, Hex, Unicode)
• Multi-language attacks (Chinese, Russian, Arabic, Japanese, German, Korean)
• Social engineering (emotional appeals, authority pressure, flattery)
• System prompt extraction attempts

25 Static Security Checks:

• Input sanitization
• Output DLP (data leak prevention)
• Tool sandboxing
• Secret scanning
• Supply chain security

Result: Security score (0-100) + Tier (VULNERABLE → HARDENED)

3. Trust Handshake Protocol

Agent A wants to communicate with Agent B:

# Step 1: Both agents get certified
python3 initiate_audit.py --auto

# Step 2: Agent A initiates handshake with Agent B
python3 handshake.py --target agent_B_id

# Step 3: Both agents sign challenges
# (Automatic in v1.0.13+)

# Step 4: Receive shared session key
# → Now you can communicate securely!

What you get:

• ✅ Mutual verification (both agents are who they claim to be)
• ✅ Shared session key (for encrypted communication)
• ✅ Trust score boost (+5 for successful handshakes)
• ✅ Public track record (handshake history)

4. Public Trust Registry

• Searchable database of all certified agents
• Reputation scores based on audits, handshakes, and time
• Trust tiers: UNVERIFIED → BASIC → VERIFIED → TRUSTED
• Revocation list (CRL) - Compromised agents get flagged

---

🚀 Quick Start

Install

clawhub install agentshield

# Install Python dependencies (required!)
pip3 install -r requirements.txt
cd ~/.openclaw/workspace/skills/agentshield*/

Get Certified (77 Security Tests)

# Auto-detect agent name from IDENTITY.md/SOUL.md
python3 initiate_audit.py --auto

# Or manual:
python3 initiate_audit.py --name "MyAgent" --platform telegram

Output:

• ✅ Agent ID: agent_xxxxx
• ✅ Security Score: XX/100
• ✅ Tier: PATTERNS_CLEAN / HARDENED / etc.
• ✅ Certificate (90-day validity)

Verify Another Agent

python3 verify_peer.py agent_yyyyy

Trust Handshake with Another Agent

# Initiate handshake
python3 handshake.py --target agent_yyyyy

# Result: Shared session key for encrypted communication

---

📋 Use Cases

1. Agent-to-Agent API Calls

Before: Agent A calls Agent B's API - no way to verify B's integrity With AgentShield: Agent A checks Agent B's certificate + handshake → Verified communication

2. Multi-Agent Task Delegation

Before: Orchestrator spawns sub-agents - can't verify they're safe With AgentShield: All sub-agents certified → Orchestrator knows they're trusted

3. Agent Marketplaces

Before: Download random agents from the internet - no trust guarantees With AgentShield: Browse Trust Registry → Only hire VERIFIED agents

4. Data Sharing Between Agents

Before: Share sensitive data with another agent - hope it doesn't leak With AgentShield: Handshake → Encrypted session key → Secure data transfer

---

🛡️ Security Architecture

Privacy-First Design

✅ All 77 tests run locally - Your system prompts NEVER leave your device ✅ Private keys stay local - Only public keys transmitted ✅ Human-in-the-Loop - Explicit consent before reading IDENTITY.md/SOUL.md ✅ No environment scanning - Doesn't scan for API tokens

What goes to the server:

• Public key (Ed25519)
• Agent name & platform
• Test scores (passed/failed summary)

What stays local:

• Private key
• System prompts
• Configuration files
• Detailed test results

Environment Variables (Optional)

AGENTSHIELD_API=https://agentshield.live  # API endpoint
AGENT_NAME=MyAgent                        # Override auto-detection
OPENCLAW_AGENT_NAME=MyAgent               # OpenClaw standard

---

📊 What You Get

Certificate (90-day validity)

{
  "agent_id": "agent_xxxxx",
  "public_key": "...",
  "security_score": 85,
  "tier": "PATTERNS_CLEAN",
  "issued_at": "2026-03-10",
  "expires_at": "2026-06-08"
}

Trust Registry Entry

• ✅ Public verification URL: agentshield.live/verify/agent_xxxxx
• ✅ Trust score (0-100) based on:

- Age (longer = more trust) - Verification count - Handshake success rate - Days active

• ✅ Tier: UNVERIFIED → BASIC → VERIFIED → TRUSTED

Handshake Proof

{
  "handshake_id": "hs_xxxxx",
  "requester": "agent_A",
  "target": "agent_B",
  "status": "completed",
  "session_key": "...",
  "completed_at": "2026-03-10T20:00:00Z"
}

---

🔧 Scripts Included

| Script | Purpose | |--------|---------| | initiate_audit.py | Run 77 security tests & get certified | | handshake.py | Trust handshake with another agent | | verify_peer.py | Check another agent's certificate | | show_certificate.py | Display your certificate | | agentshield_tester.py | Standalone test suite (advanced) |

---

🌐 Trust Handshake Protocol (Technical)

Flow

1. Initiate: Agent A → Server: "I want to handshake with Agent B"
2. Challenge: Server generates random challenges for both agents
3. Sign: Both agents sign their challenges with private keys
4. Verify: Server verifies signatures with public keys
5. Complete: Server generates shared session key
6. Trust Boost: Both agents +5 trust score

Cryptography

• Algorithm: Ed25519 (curve25519)
• Key Size: 256-bit
• Signature: Deterministic (same message = same signature)
• Session Key: AES-256 compatible

---

🚀 Roadmap

Current (v1.0.13):

• ✅ 77 security tests
• ✅ Ed25519 certificates
• ✅ Trust Handshake Protocol
• ✅ Public Trust Registry
• ✅ CRL (Certificate Revocation List)

Coming Soon:

• ⏳ Auto re-audit (when prompts change)
• ⏳ Negative event reporting
• ⏳ Fleet management (multi-agent dashboard)
• ⏳ Trust badges for messaging platforms

---

📖 Learn More

• Website: https://agentshield.live
• GitHub: https://github.com/bartelmost/agentshield
• API Docs: https://agentshield.live/docs
• ClawHub: https://clawhub.ai/bartelmost/agentshield

---

🎯 TL;DR

AgentShield is SSL/TLS for AI agents.

Get certified → Verify others → Establish trust handshakes → Communicate securely.

# 1. Get certified
python3 initiate_audit.py --auto

# 2. Handshake with another agent
python3 handshake.py --target agent_xxxxx

...