Tangn
t
Patent Pending
Encounter Engine
E = Σ ( Wᵢ × Fᵢ × Dᵢ × Cᵢ ) · 6-layer pipeline · privacy-first by design
Layer 1 — Detection
Raw GPS → Zone snap → Pair hash → Encounter log
Raw GPS
coords received
Zone snap
coords discarded
Pair hash
crypto device ID
Encounter log
zone · window · count
Layer 2 — Anti-spoofing (4-stage filter)
velocity · dwell time · overlap count · zone confidence
Layer 3 — Encounter scoring
E = Σ ( Wᵢ × Fᵢ × Dᵢ × Cᵢ ) scaled 0–100
Wᵢ — temporal
recency weight
Fᵢ — frequency
overlap count
Dᵢ — duration
time in zone
Cᵢ — context
campus 0.8–1.0
Layer 4 — Decay engine
E(t) = E₀ × e^(−λt) · campus λ/6hr · airport λ/30min
Layer 5 — Tier unlock
score gates identity reveal · signal availability · messaging
Tier 0
anonymous · 0–9
Tier 1
name visible · 10–24
Tier 2
profile + signal · 25–49
Tier 3
strong orbit · 50+
Layer 6 — Privacy layer
ghost mode · no raw coords stored · hashed pairs · identity gated by tier