ashleyscomputer/gigo-sentinel

Offline-first South African scam intelligence with a physical Arduino cyber-alert Sentinel # 🛡️ GIGO Sentinel ### Offline-first scam intelligence that becomes a physical cyber alert **A South African mobile-security hackathon project by Ashley Van Rooyen** > **The internet makes GIGO smarter. It does not make GIGO work.** --- ## The problem Scams are increasingly convincing, but many protection tools depend on cloud access, arrive after the damage is done, or overwhelm people with technical language. **GIGO provides an immediate, understandable risk assessment—even offline—and turns serious digital threats into a visible, physical warning.** ## The solution | Mobile protection | Physical protection | Responsible intelligence | |---|---|---| | Offline 0–100 scam scoring | Green, yellow and red LEDs | Explainable signals, never random scores | | Messages, links and email checks | OLED status and safety tips | South African organisation directory | | Local history and report queue | Buzzer and physical ACK button | Governed multi-agent evidence review | | iOS and Android through Expo | Arduino Uno over USB serial | Privacy-minimised cloud sync | ## Mobile experience GIGO uses five focused tabs: - **Home** — current protection status and quick actions - **Check** — analyse suspicious messages, URLs and email content - **Alerts** — view live Sentinel evidence and start the guided demo - **Learn** — practical scam-awareness lessons and safety tips - **Profile** — local preferences, sync and Premium access Core checks work without an account, cloud API or internet connection. ## South African intelligence GIGO provides verified guidance for organisations frequently impersonated in local scams: **Capitec · FNB · Absa · Standard Bank · Nedbank · SARS · SASSA · NSFAS** The detector explains OTP, Remote PIN, payment, urgency, impersonation, credential, sender-domain and suspicious-link signals in plain language. ## Physical Sentinel The Arduino Uno Sentinel converts governed risk into a response people can see and hear: | Risk | State | Ha …