Shivam Gupta

Shivam Gupta's avatar
Shivam Gupta
🛡️ shivamgupta@NostrAddress.com
npub1ddek...xqhd
Bitcoin Mining Firmware & Protocol Dev | Nostr/Lightning Educator | Business Development | Bitcoin Maxi | Helping grow the decentralized future 🙌
📍 Your Phone # Leaks Your Location on WhatsApp/Signal Sending messages? Delivery times expose your exact spot—80%+ accuracy even within the same city. Combine with "Careless Whisper" (❤️ reactions track screen/activity) = complete location + behavior map. The Attack: Attacker sends messages → measures response delays RTT (round-trip timing) fingerprints your network location Works on Signal, Threema, WhatsApp—all have E2EE but metadata leaks
arXiv.org
Careless Whisper: Exploiting Silent Delivery Receipts to Monitor Users on Mobile Instant Messengers
With over 3 billion users globally, mobile instant messaging apps have become indispensable for both personal and professional communication. Besid...
 The Fix: Providers: Add random delays (seconds). Users: Disable read receipts, use burner numbers, switch to usernames when possible. Research: NDSS 2023 paper on delivery timing attacks 📄.pdf #privacy #security #bitcoin #surveillance #whatsapp #signal #cryptography #nostr #freedom #decentralization #anonymity #infosec #cybersecurity #privacymatters #foss #censorship #zeroknowledge
Banks in 2025: “You bought coffee in a different state? Account frozen, call us Monday 9-5.” Bitcoin in 2025: Sent $50M to the other side of the planet on a Sunday at 3am. No permission asked, no one to beg #nostr #finance #bitcoin #btc
It is very expensive to be poor. Because when you are poor, everything costs more: • You can’t buy in bulk, so you pay higher unit prices • You can’t afford quality, so cheap things break faster and need replacing • You can’t access good credit, so you pay higher interest • You can’t invest early, so you lose years of compounding • You can’t take risks, so you stay stuck in low-paying paths and fear • You can’t afford nutrition, so your health deteriorates • You can’t afford events or conferences, so you don’t get exposed to high-value network or opportunities • One emergency can wipe out everything Poverty isn’t just a lack of money. It is a tax on the poor that keeps them poor. #bitcoin #finance #nostr image