Signal Isolated Authentication
Overview
Maximally isolated Signal client authentication using colored operad security boundaries. Implements nested isolation layers (Network → Firewall → Container → VM → Trusted) with each layer assigned a security color that enforces data flow constraints.
┌─────────────────────────────────────────────────────────────────────────────┐
│ COLORED OPERAD ISOLATION STACK │
└─────────────────────────────────────────────────────────────────────────────┘
External World (Untrusted)
│
▼
┌──────────────────────────────────────────────────────────────────────┐
│ 🔴 RED: Network Boundary (trit=-1) │
│ • Network namespace isolation │
│ • DNS filtering (*.signal.org only) │
│ • Firewall: outbound-only, ports 443/80 │
│ ┌────────────────────────────────────────────────────────────────┐ │
│ │ 🟡 YELLOW: Container Boundary (trit=-1) │ │
│ │ • Podman/Docker rootless │ │
│ │ • --privileged=false, --read-only │ │
│ │ • Seccomp profile, AppArmor/SELinux │ │
│ │ • CAP_DROP=ALL, CAP_ADD=NET_RAW │ │
│ │ ┌──────────────────────────────────────────────────────────┐ │ │
│ │ │ 🟢 GREEN: VM Boundary (trit=0) │ │ │
│ │ │ • Firecracker microVM │ │ │
│ │ │ • 1 vCPU, 512MB RAM │ │ │
│ │ │ • Minimal kernel, read-only rootfs │ │ │
│ │ │ ┌────────────────────────────────────────────────────┐ │ │ │
│ │ │ │ 🔵 BLUE: Trusted Core (trit=+1) │ │ │ │
│ │ │ │ • Signal CLI process │ │ │ │
│ │ │ │ • Key material in memory-encrypted enclave │ │ │ │
│ │ │ │ • Attestation verification │ │ │ │
│ │ │ └────────────────────────────────────────────────────┘ │ │ │
│ │ └──────────────────────────────────────────────────────────┘ │ │
│ └────────────────────────────────────────────────────────────────┘ │
└──────────────────────────────────────────────────────────────────────┘
GF(3) Conservation
RED(-1) ⊗ YELLOW(-1) ⊗ GREEN(0) ⊗ BLUE(+1) = -1
To balance: Add dynamic-sufficiency(-1) + skill-dispatch(0) + signal-messaging(+1)
Full triad: (-1) + (-1) + (0) + (+1) + (-1) + (0) + (+1) = -1 + 1 = 0 ✓
| Role |
Skill/Layer |
Trit |
Function |
| MINUS (-1) |
signal-isolated-auth |
-1 |
THIS SKILL - validates enclosure |
| MINUS (-1) |
Network + Container |
-2 |
External constraints |
| ERGODIC (0) |
VM boundary |
0 |
Coordination layer |
| PLUS (+1) |
Trusted core |
+1 |
Key generation |
Supported Signal Clients
| Client |
Technology |
Status |
Notes |
| signal-cli |
Java |
✅ Primary |
Full protocol support |
| presage |
Rust |
✅ Supported |
Modern, performant |
| whisperfish |
Rust/QML |
⚠️ Experimental |
Sailfish OS focused |
| libsignal |
Rust |
⚠️ Library |
Requires wrapper |
Security Color Rules
Color Flow Constraint
Data can only flow INWARD (less trusted → more trusted):
RED → YELLOW → GREEN → BLUE ✓
BLUE → RED ✗ (security violation)
Color-to-Trit Mapping
| Color |
Trust Level |
Trit |
Meaning |
| 🔴 RED |
1 (lowest) |
-1 |
External constraint |
| 🟡 YELLOW |
2 |
-1 |
Container constraint |
| 🟢 GREEN |
3 |
0 |
Boundary coordination |
| 🔵 BLUE |
4 (highest) |
+1 |
Trusted generation |
Usage
Python API
from signal_isolation_manager import (
SignalIsolationManager,
SignalClientType,
build_agentorama_signal_pathway,
)
# Build maximally isolated pathway
pathway = build_agentorama_signal_pathway(
name="agent-signal-secure",
client_type=SignalClientType.SIGNAL_CLI,
max_isolation=True, # VM + Container
)
# Start isolated environment
manager = pathway.isolation_manager
await manager.start_isolated()
# Authenticate via device linking
link_uri = await manager.authenticate_link("agent-o-rama")
print(f"Scan QR code: {link_uri}")
# Or register new account
await manager.authenticate_register("+1234567890")
await manager.verify_code("123456")
# Get s-expression for categorical processing
print(manager.get_enclosure_sexp())
Julia API (WorldColoredOperads)
using Gay.WorldColoredOperads
# Build Signal-specific enclosure
enclosure = world_signal_enclosure(:signal_cli; seed=0xE12A4E)
# Verify security properties
result = verify_enclosure(enclosure)
println("Security score: ", result.security_score)
println("GF(3) balanced: ", result.gf3_balanced)
println("Color chain: ", result.color_chain)
# Output as s-expression
println(to_sexp(enclosure))
CLI Usage
# Start Signal in maximum isolation
python signal_isolation_manager.py
# With specific client
python -c "
import asyncio
from signal_isolation_manager import *
async def main():
manager = SignalIsolationManager(
client_type=SignalClientType.PRESAGE,
use_vm=True,
use_container=True,
)
manager.build_enclosure('+1234567890')
await manager.start_isolated()
link = await manager.authenticate_link('my-agent')
print(link)
asyncio.run(main())
"
S-Expression Output
All authentication events emit s-expressions for categorical processing:
(signal-auth-event
:type :device-link
:device-name "agent-o-rama"
:enclosure-fingerprint "a3b7c9d1e5f2"
:link-uri "sgnl://linkdevice?uuid=agent-a3b7c9d1&pub_key=..."
:timestamp 1735689600
:color-chain (:red :yellow :green :blue))
(isolation-enclosure
:target "signal_signal-cli"
:client "signal-cli"
:fingerprint "a3b7c9d1e5f2"
:gf3-sum -1
:gf3-balanced nil
:valid t
:security-score 100
:color-chain (:red :yellow :green :blue)
:layers (
(layer :name "network_isolation" :color :red :tech :network :trit -1)
(layer :name "firewall_rules" :color :red :tech :firewall :trit -1)
(layer :name "container_boundary" :color :yellow :tech :container :trit -1)
(layer :name "vm_boundary" :color :green :tech :firecracker :trit 0)
(layer :name "trusted_signal_process" :color :blue :tech :enclave :trit 1)
))
Isolation Technologies
Firecracker microVM (Recommended)
vm:
type: firecracker
vcpus: 1
memory_mb: 512
kernel: vmlinux-5.10-signal
rootfs: signal-rootfs.ext4
boot_args: "console=ttyS0 reboot=k panic=1 pci=off"
jailer:
uid: 1000
gid: 1000
chroot: /srv/jailer/signal
Container (Podman Rootless)
podman run \
--rm \
--read-only \
--security-opt no-new-privileges \
--cap-drop=ALL \
--cap-add=NET_RAW \
--network=slirp4netns \
-v /path/to/data:/data:rw \
signal-cli-isolated:latest \
daemon --json
Firejail (Alternative)
firejail \
--private=/tmp/signal-sandbox \
--net=none \
--seccomp \
--noroot \
signal-cli daemon
Agent-O-Rama Integration
This skill provides a pathway for Agent-O-Rama's Signal communication:
from signal_isolation_manager import AgentOramaPathway
# Pathway carries color attributes for all components
pathway = AgentOramaPathway(
name="signal-isolated",
isolation_manager=manager,
color_attributes={
"ingress": SecurityColor.RED, # Network input
"processing": SecurityColor.YELLOW, # Container work
"verification": SecurityColor.GREEN, # VM attestation
"execution": SecurityColor.BLUE, # Trusted action
}
)
# GF(3) conservation across pathway
print(f"Pathway trit sum: {pathway.trit_sum}")
Required Skills (Dependency Triad)
| Skill |
Trit |
Status |
Purpose |
| signal-isolated-auth |
-1 |
✅ THIS |
Isolation boundary |
| dynamic-sufficiency |
-1 |
✅ Have |
ε-machine gating |
| signal-messaging |
0 |
✅ Have |
Message transport |
| gay-mcp |
+1 |
✅ Have |
Color generation |
Files
| File |
Purpose |
signal_isolation_manager.py |
Main isolation orchestrator |
Gay.jl/src/world_colored_operads.jl |
Julia security model |
configs/signal_seccomp.json |
Seccomp profile |
configs/firecracker_signal.json |
Firecracker config |
Security Considerations
- Key Material: Never leaves BLUE boundary
- Network: Egress-only to *.signal.org
- Persistence: Data encrypted at rest in dedicated volume
- Attestation: VM and enclave verified before key operations
- Least Privilege: CAP_DROP=ALL, minimal syscalls
Related Skills
dynamic-sufficiency - ε-machine gating for skill coveragesignal-messaging - Message send/receive (requires auth)gay-mcp - Deterministic color generationlivekit-omnimodal - Real-time coaching integrationblackhat-go - Adversarial security analysis