I revisited the ACME protocol today: the system that silently keeps much of the web secure. What was interesting to me wasn’t just the cryptography, but the design philosophy behind it. ACME intentionally separates identity from authorization, and relies on operational proofs (DNS/HTTP) rather than pure signatures. Not because signatures are “less secure,” but because protocols must prove the right thing, in this case, real control of a domain. It’s a great reminder that elegant security design isn’t about choosing the most sophisticated primitive, but the one that perfectly fits the trust boundary. Thanks to Christophe Brocas for the excellent write-up, and to the entire ACME team & community for designing one of the most impactful security protocols on the Internet. https://blog.brocas.org/2025/12/01/ACME-a-brief-history-of-one-of-the-protocols-which-has-changed-the-Internet-Security/ #BitcoinCustody #ProtocolDesign #CyberSecurity

🚀 Barqly Vault v0.2.2 is live! This release adds a useful new capability inspired by a question from Rohit on LinkedIn last week: 🔐 Secure Sharing • Encrypt files for other people using their public key • Vault auto-generates two outputs: — Your backup file (full keyset) — A shared file you can safely send • No private key exchange needed 🎨 UI/UX updates • Better key-management flow • Cleaner layout and status indicators ⚙️ Stability improvements • Smoother multi-key operations • Minor performance fixes 🌐 Download: https://barqly.com 📄 Release notes: https://github.com/Barqly/barqly-vault/releases/tag/v0.2.2 #Bitcoin #SelfCustody #OpenSource #CyberSecurity #Privacy #Barqly

🚀 Barqly Vault v0.2.0 is live! After months of iteration, debugging, and cross-platform testing — the R2 release is finally here. 💡 What’s new in 0.2.0: • YubiKey Support – Hardware-backed encryption & decryption for tamper-resistant security • Multi-Key Vaults – Encrypt files with up to 4 keys (YubiKey or passphrase) for redundancy & flexibility • Recovery Support – Restore your vault using any one valid key and the included recovery bundle • Offline-Only Operation – 100% local encryption; no network activity, telemetry, or background calls • Local Storage – Files, manifests, and keys never leave your device • Cross-Platform Builds – Available for macOS, Linux, and Windows (testing in progress) • Theme-Aware Interface – Light & dark themes for a better user experience Built with ❤️ for the Bitcoin community — focused on simple, secure file encryption for everyone. 🌐 www.barqly.com 🔗 github.com/Barqly/barqly-vault (Blog and technical deep-dive coming soon!)

🚀 Barqly Vault v0.2.1 — Now Fully Supports Windows 🎉 Windows support is officially live! Barqly Vault now runs seamlessly across macOS, Linux, and Windows — with full YubiKey support, multi-key encryption, and complete recovery workflows. 🔥 What’s new in 0.2.1: Full Windows Support: All core features now work consistently on Windows Improved Stability: Fixes across installers, startup behavior, and shutdown Cross-Platform Parity: Vaults behave identically across macOS, Linux, and Windows More Reliable YubiKey Handling: Better error messaging and smoother operations 🔐 Includes everything from 0.2.0: - YubiKey-based encryption & decryption - Multi-Key Vaults (upto 4 keys: YubiKeys or passphrases) - Recovery bundle for single-key restoration - 100% offline encryption — no telemetry, no background calls - Local-only storage - Theme-aware UI (light/dark/system) Built with ❤️ for the Bitcoin community — simple, offline-first file encryption for everyone. 🌐 www.barqly.com 💻 https://lnkd.in/gRgV5RPf Deep-dive posts coming soon.