A mile down, sperm whales are talking, and we only learned to listen ten years ago. Notes on nature's intelligence, travel, and what I'm thinking about.https://www.swagatachatterjee.com/https://www.swagatachatterjee.com/doing/stadt-wehlen/https://www.swagatachatterjee.com/doing/stadt-wehlen/A small town on the Elbe, a trail with a painter's name, and a ferry ride that arrived by happenstance.Mon, 07 Sep 2026 00:00:00 GMTWhat I'm doingtravelhikingsaxonyhttps://www.swagatachatterjee.com/thinking/crypto-shredding/https://www.swagatachatterjee.com/thinking/crypto-shredding/An event log remembers everything by design, and people hold the right to be forgotten. Destroying one encryption key reconciles the two.Tue, 21 Apr 2026 00:00:00 GMTWhat I'm thinkingprivacyarchitecturecryptography