Comparison with Other Privacy Solutions

Feature Matrix

Feature	BlindHop (Nym)	Tor	Nym (standalone)	Substrate Mixnet Spec	Integritee
Target	Light clients	General	General	Full nodes	Sidechains
Architecture	Nym mixnet proxy	Onion routing	Sphinx/Loopix	Sphinx mixing	TEE enclaves
Integration	WS proxy + exit SP	SOCKS proxy	SDK	Native runtime	Sidechain bridge
Anonymity set	500+ mix nodes	~6000 relays	500+ mix nodes	Chain validators	TEE operators
Cover Traffic	✅ Loopix (via Nym)	❌	✅ Loopix	✅	N/A
Timing Resistance	✅ Poisson delays	⚠️ Limited	✅ Poisson delays	✅	N/A
Browser Support	✅ (via proxy)	⚠️ Bridge	⚠️ Bridge	❌	❌
Privacy Slider	✅ None/Fast/Full	❌	❌	❌	❌
Substrate-native	✅ JSON-RPC aware	❌	❌	✅	✅
Trusted Setup	❌ None	N/A	N/A	N/A	✅ Intel SGX

Detailed Comparisons

vs. Using Tor

Tor uses circuit-based onion routing without mixing or delays:

• Packets traverse in sequence through a fixed circuit (no reordering)
• No cover traffic (idle users are distinguishable from active users)
• Known vulnerable to traffic correlation by a global passive adversary

BlindHop's Nym integration provides Loopix mixing with Poisson delays — stronger anonymity at the cost of higher latency.

vs. Nym Directly

Using the Nym SDK directly for Substrate access requires building your own exit service and JSON-RPC handling. BlindHop provides:

• Ready-made exit service (blindhop-exit) that understands JSON-RPC
• Privacy slider for runtime mode switching
• MixnetTransport trait for future pluggable backends
• Substrate-aware metrics and monitoring

vs. Substrate Mixnet Specification

The Substrate Mixnet Spec defines mixing at the full node level:

• Designed for full nodes, not light clients
• Requires runtime changes (pallet integration)
• No production deployment yet

BlindHop works with existing Substrate chains — no runtime modifications needed.

vs. Integritee

Integritee uses Trusted Execution Environments (Intel SGX):

• Requires specific hardware (Intel SGX)
• Trust assumption: Intel's hardware security
• No network-level privacy (TEEs protect computation, not traffic patterns)

BlindHop provides network-level metadata privacy with no hardware trust assumptions.