THURSDAY, MAY21
1. Nostr VPN, 2. iPhone-Android E2EE RCS, 3. Bitcoin quantum exposure, 4. Node NBO Nairobi opens
From Proto and Bitkey - part of the Bitcoin ecosystem at Block, Inc.
1. nostrvpn
Martti Malmi, one of Bitcoin’s earliest developers and Satoshi Nakamoto’s first major collaborator, has released a new version of Nostr VPN — an open-source mesh network that eliminates the central-server trust model of conventional VPN services and replaces it with cryptographic public keys, peer-to-peer routing, and user-operated exit nodes. Malmi, known in Bitcoin’s founding years as “Sirius,” told followers on X that Tailscale’s account requirement prompted him to build the alternative, describing it as “a Tailscale-style mesh that runs on public keys rather than email accounts or third-party logins.” The release adds a multiplatform interface, Nostr-based multihop routing via the FIPS protocol, and encrypted WireGuard traffic via boringtun between nodes. Because no company holds the logs, there is no intermediary to subpoena — the architecture maps directly to the sovereignty argument animating Bitcoin’s original design. The release lands as governments across multiple jurisdictions tighten VPN controls and expand surveillance powers, making the timing of a censorship-resistant, identity-free network layer more consequential than a typical developer release.
-EDITOR·OP_DAILY2. encryption
Apple and Google have closed the longest-running gap in mainstream messaging security: iOS 26.5 enables end-to-end encryption for RCS messages between iPhone and Android users, meaning conversations between the two ecosystems are now protected by default for the first time. The EFF called it a meaningful win, noting that encryption is on by default and will roll out automatically to new and existing RCS conversations as carriers adopt GSMA Universal Profile 3.0, built on the Messaging Layer Security protocol. Apple and Google collaborated with the GSM Association on the standard; encrypted conversations display a lock icon in both Messages and Google Messages apps. The feature arrives as Canada’s Bill C-22 advances an opposing agenda — mandating surveillance capability installation on demand — and as EU Chat Control resurfaces, making this cross-platform baseline more significant than its technical description suggests. Prior to this release, every iPhone-to-Android message since RCS’s introduction was technically readable by carriers and any interceptor with network access.
-EDITOR·OP_DAILY3. exposure
Glassnode Research has published the most granular on-chain quantum exposure assessment to date, finding that 6.04 million BTC — 30.2% of issued supply — has its public key currently visible on-chain. The firm separates structural exposure (1.92 million BTC, 9.6%) from operational exposure (4.12 million BTC, 20.6%). The structural category covers P2PK outputs from the Satoshi era, bare multisig structures, and Taproot outputs — address types where the public key is visible by design regardless of how the owner manages the wallet. According to Cointelegraph’s reporting on the Glassnode report, among major exchanges Binance shows 85% of labeled balances in exposed structures, Bitfinex 100%, and Coinbase just 5%. Glassnode explicitly recommends exchanges and custodians standardize address usage and implement migration plans as near-term steps that require no protocol change, and names BIP-360’s P2MR output format as the long-term upgrade path. The remaining 69.8% of supply currently shows no public-key exposure under the framework.
-EDITOR·OP_DAILY4. nairobi
Node NBO, Africa’s newest physical Bitcoin campus, opened in Nairobi, Kenya on May 16, housing Fedi, Gridless, BTrust, and the Human Rights Foundation alongside three operational labs: an open-source energy lab, a Bitcoin mining lab, and an AI compute lab. The soft launch was attended by Fedi CEO Obi Nwosu, Gridless co-founders Janet Maingi, Erik Hersman, and Philip Walton, and BTrust CEO Abubakar Nur Khalil, among members of the Kenyan Bitcoin community. As Bitcoin Magazine reported, the campus treats energy, AI, and freedom tech as “three locked colors” that “operate independently but compound through proximity,” aiming to accelerate Bitcoin infrastructure in a region where Africa’s stranded energy surplus is the world’s most undervalued asset. A BitDevs Nairobi chapter will meet monthly in the event space alongside quantum computing researchers from the city. The opening reflects a pattern established by Bitcoin Park in Nashville and Austin: physical convergence spaces that accelerate collaboration across mining, protocol development, and human rights applications.
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