https://rikettsie.github.io/posts/ Recent content in Posts on Enrico's notes Hugo -- 0.161.1 en-us Mon, 25 May 2026 00:00:00 +0000 https://rikettsie.github.io/posts/iroh-rings-access-permission-data-model/ Mon, 25 May 2026 00:00:00 +0000 https://rikettsie.github.io/posts/iroh-rings-access-permission-data-model/ iroh-rings started with a binary ALLOWED/DENIED access model. Reasoning here the transition to a READ/WRITE/DELETE permission model. https://rikettsie.github.io/posts/ringdrop-p2p-file-drop/ Thu, 21 May 2026 00:00:00 +0000 https://rikettsie.github.io/posts/ringdrop-p2p-file-drop/ How to compose iroh’s transport, content-addressed blob storage, and ring-based access control into a permission-aware P2P file drop. https://rikettsie.github.io/posts/iroh-rings-p2p-access-control/ Fri, 15 May 2026 00:00:00 +0000 https://rikettsie.github.io/posts/iroh-rings-p2p-access-control/ How I designed a ring-based access control library on top of iroh — and why the Registry trait is the most important design decision in it. https://rikettsie.github.io/posts/encrypted-protocols-three-layers/ Thu, 09 Apr 2026 00:00:00 +0000 https://rikettsie.github.io/posts/encrypted-protocols-three-layers/ How two peers exchanging encrypted frames can synchronize with each other — and why byte stuffing exists. https://rikettsie.github.io/posts/bao-verified-streaming/ Sat, 28 Mar 2026 00:00:00 +0000 https://rikettsie.github.io/posts/bao-verified-streaming/ How BAO makes BLAKE3 hashes useful for streaming: verifying data without buffering the whole file. https://rikettsie.github.io/posts/nat-traversal-hole-punching-iroh/ Sat, 08 Nov 2025 00:00:00 +0000 https://rikettsie.github.io/posts/nat-traversal-hole-punching-iroh/ How hole punching works, why TCP and plain UDP fall short, and how QUIC and iroh make direct P2P connections reliable. https://rikettsie.github.io/posts/bloom-filters/ Mon, 25 Aug 2025 00:00:00 +0000 https://rikettsie.github.io/posts/bloom-filters/ How to use a Bloom filter to check membership across 100 million URLs without blowing up RAM — and why a hash set wouldn’t cut it. https://rikettsie.github.io/posts/external-merge-sort/ Sun, 18 May 2025 00:00:00 +0000 https://rikettsie.github.io/posts/external-merge-sort/ How external merge sort handles datasets larger than RAM, using sorted runs and k-way merging. https://rikettsie.github.io/posts/signal-x3dh-pqxdh-double-ratchet/ Fri, 20 Oct 2023 00:00:00 +0000 https://rikettsie.github.io/posts/signal-x3dh-pqxdh-double-ratchet/ How Signal achieves forward secrecy, break-in recovery, and deniability — from X3DH to PQXDH and the Double Ratchet. https://rikettsie.github.io/posts/kademlia-xor-distance/ Mon, 10 Jul 2023 00:00:00 +0000 https://rikettsie.github.io/posts/kademlia-xor-distance/ The working principle of Kademlia, in particular relating to the XOR distance metric.