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Summary: "Are we self-sovereign PKI yet?" by Buffrr (May 6, 2026) buffrr.dev

Are we self-sovereign PKI yet?

Every end-to-end encrypted messenger ships a fingerprint UI. Almost nobody opens it. A note on what's actually missing.

The article argues that while we have end-to-end encryption in messaging apps (Signal, iMessage, WhatsApp, etc.), it's undermined by a fundamental flaw: you can't reliably know you're using the right public key for someone. Safety numbers, contact verification, and similar features exist but are rarely used, making encryption "end-to-end conditional on the platform being honest." The Core Problem = Binding human-readable names/identities (email, usernames, keys) to public keys still relies on custodial intermediaries: Email: Providers can read, suspend, or hand over accounts; self-hosting is impractical due to spam filters. Usernames: Scattered across platforms with no easy cross-proof (Keybase tried but faded after acquisition). Traditional PKI (for domains): Certificate Authorities (CAs), DNS, and even DNSSEC are vulnerable to attacks like BGP hijacks. Workarounds like Certificate Transparency help detect issues but don't eliminate trust in operators. Every layer assumes trust in someone else (CAs, registrars, providers). The Ideal Solution = A self-sovereign system where a name like grace@key directly and verifiably resolves to a public key - no revocation, suspension, or central authority. Resolving the name is the verification; no manual fingerprint checks needed. Spaces Protocol is presented as a practical step toward that ideal: Names live in a binary Merkle trie, with the root hash committed to Bitcoin (as a tamper-resistant timestamp). Handles (e.g., grace@key) are issued under parent "spaces" (@key). Issuance is off-chain/batched for users; resolution uses Merkle proofs against the Bitcoin-committed root. Records (e.g., Age keys, Nostr pubkeys) are signed and distributed peer-to-peer via Certrelay. Trust anchor: A single 32-byte hash (one global "safety number"). Verified via a desktop tool (Veritas) that checks Bitcoin headers and protocol rules locally. Future: Zero-knowledge certificate (~250 KB succinct proof) for instant, no-sync verification. This creates a "CA without a private key" - trust is reshaped into auditable computation + Bitcoin's proof-of-work, not a compromisable signing key. Considerations & Trade-offs Key rotation/loss: Manageable for rotation; harder for total loss (social recovery ideas exist but imperfect). Issuance: Top-level spaces via burning auctions (slow, anti-squatting); handles via batches/faucet. Adoption: Hardest challenge - needs app integration. Limitations: Trusts Bitcoin's long-term security and software supply chain; doesn't solve the "social" side of identity (reputation, knowing it's the right person). Bottom line: Traditional PKI and identity systems remain custodial. Spaces offers a concrete, working shape for self-sovereign PKI using Bitcoin as a neutral anchor - a missing piece after decades of attempts. It's not fully adopted yet, but the architecture points in the right direction. #Bitcoin #SpacesProtocol #PKI #Cryptography

Are we self sovereign PKI yet? Signal is end to end encrypted in the sense that the keys are end to end. Whether you got the right keys is a different question, and almost nobody asks it. The missing piece, for a long time, has been a way to bind a human scale name to a key without trusting a server, a registrar, or a CA. The shape of that piece is now clear enough to point at.👇

Are we self-sovereign PKI yet?

Every end-to-end encrypted messenger ships a fingerprint UI. Almost nobody opens it. A note on what's actually missing.

#Bitcoin #PKI #Cryptography

🚨This is the group chat you've been waiting for. Sick of Discord nuking your community overnight or Telegram playing god with your server? Meet Orbee Chat - built on Nostr and open standards. Your name is yours for life (yourname@orbee). You own it. No one can steal it, rename it, or lock you out. Disagree with the host? Pack up your people and move servers instantly. Your name. Your people. Your rules. No tracking. No analytics. No Big Tech overlords. Just pure, sovereign group chat that lives on the open internet - just like Bitcoin. Web app is live RIGHT NOW👉

Orbee

Orbee - your name, your people, your rules

A group chat app where your name is yours for life, the server is whoever you want, and nobody can lock you out.

(iOS, Android, desktop) dropping soon. This is chat sovereignty for the cypherpunk era. If you believe in owning your money, it's time to own your conversations too. #Bitcoin #Nostr #Decentralization #OwnYourName

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Tired of building on rented land? ❌Discord can nuke your server tomorrow. ❌Telegram can ban your group in seconds. ✅Orbee? You own your @name forever with Bitcoin + Nostr keys. No landlord. No bans. Move your entire community anywhere. Sovereign groups that actually belong to you. This is what real decentralization looks like. The future isn’t renting better cages. It’s owning the damn house. #Orbee #Nostr #Bitcoin #OwnYourName

Hello world, Imagine the internet but way cooler and fairer. Like your own name tag that nobody can steal or boss around. What is Spaces Protocol? Right now, if you want a cool username like alice@bitcoin or a website name, you usually have to go to a company (like GoDaddy or Google). They charge you money every year (rent), and they can take it away if they want. Spaces Protocol is a new system built on Bitcoin (the super secure money network) that lets you own your name forever, with your own keys (like a secret password only you have). No companies, no yearly fees, no one can kick you out. How does it work? (Like a 3 step video game) 1. Big Names (Spaces) get auctioned Cool top names like @bitcoin or @game are sold in public auctions on Bitcoin. You pay with Bitcoin, but the money gets burned (destroyed) so no company gets rich. Only about 10 new big names per day. Highest bidder wins after ~10 days. 2. You get your personal handle Once someone owns a Space (like @bitcoin), they can create millions of handles inside it, like you@bitcoin. They do this in big batches using smart math (32-byte Merkle trees) so it stays lightweight, cheap and secure. 3. It works everywhere without slowing Bitcoin down Your name info lives off chain (not clogging up Bitcoin). But everything is proven and checked against Bitcoin's super strong security. You can prove it's really yours with math, no trusting random companies. Why is this awesome? Your name. Your rules. You control it with your Bitcoin wallet. No one can delete or censor it. No rent, pay once (or almost nothing). Trustless, It doesn't rely on big companies like normal internet names (DNS). You verify everything yourself with Bitcoin's power. Works for wallets, Nostr (a decentralized social thing), apps, etc. New Update! Live auctions, better tools, wallets like Akron, and an explorer so you can see everything happening. It's like giving every person on the internet their own permanent, unstoppable username powered by the same tech that makes Bitcoin super hard to mess with. Pretty neat, right?

Spaces Protocol

Spaces Protocol - Sovereign Naming on Bitcoin

Sovereign naming native to Bitcoin

#Bitcoin #SpacesProtocol

Subspaces JUST LAUNCHED on Bitcoin Mainnet – Millions of Sovereign Identities Are HERE!🔥 In Spaces Protocol technical updates, the team recently released an April 2026 community video covering progress toward Subspaces mainnet alpha (or beta) launch. They also introduced a new resolver and a relay network called Cert Relay. Cert Relay operates over HTTP and works directly in browsers, offering improved accessibility. Community members are asking whether this new system will replace or complement the existing Fabric DHT network used for discovery and relaying of Nostr and Spaces records. #Bitcoin #BitcoinMainnet #SpacesProtocol #CertRelay

NIP-SPACES: a sovereign alternative to NIP-05 NIP-05 ties Nostr identities to DNS, which means trust ultimately flows through ICANN, registrars, and certificate authorities. NIP-SPACES swaps that out. Identities are anchored to Bitcoin and verified locally with Merkle proofs. No registrar can revoke you, no DNS hijack can impersonate you, and verification works without trusting anyone's server. If you've used name@domain.com for Nostr verification, NIP-SPACES gives you name@space with cryptographic guarantees instead of administrative ones.

GitHub

nips/NIP-SPACES.md at spaces · buffrr/nips

Nostr Implementation Possibilities. Contribute to buffrr/nips development by creating an account on GitHub.

Spaces Protocol

Spaces Protocol: May 2026 Update

100 million handles, Orbee, Fabric SDK in 7 languages, Certrelay, Veritas, Subs v0.1, and NIP-SPACES.

#Bitcoin #NIPSpaces #NIP05 #DNS

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