Obscura articles https://hfiguera.github.io/obscura/ Engineering notes about PII detection and anonymization in Elixir. en Wed, 12 Aug 2026 00:00:00 GMT Privacy-Safe Phoenix Socket and Channel Logging Without Exposing Payloads https://hfiguera.github.io/obscura/blog/privacy-safe-phoenix-realtime-logging/ https://hfiguera.github.io/obscura/blog/privacy-safe-phoenix-realtime-logging/ Wed, 12 Aug 2026 00:00:00 GMT An engineering case study about restoring Phoenix socket and channel visibility with omitted payloads, static labels, bounded redaction, and explicit correlation. Privacy-Safe Phoenix Request Logging Without Changing Controller Params https://hfiguera.github.io/obscura/blog/privacy-safe-phoenix-request-logging/ https://hfiguera.github.io/obscura/blog/privacy-safe-phoenix-request-logging/ Fri, 07 Aug 2026 00:00:00 GMT An engineering case study about closing the gap between redacted Phoenix assigns and default request logging without changing controller input. Making PII Detection Faster Without Keeping the Input Alive https://hfiguera.github.io/obscura/blog/making-pii-detection-faster-without-keeping-input-alive/ https://hfiguera.github.io/obscura/blog/making-pii-detection-faster-without-keeping-input-alive/ Wed, 05 Aug 2026 00:00:00 GMT An Elixir engineering case study about optimizing Obscura's fast profile while preserving output compatibility and proving BEAM binary ownership. A Model Card Is Not a License: What We Learned Shipping Local NER in Obscura https://hfiguera.github.io/obscura/blog/model-card-is-not-a-license/ https://hfiguera.github.io/obscura/blog/model-card-is-not-a-license/ Wed, 29 Jul 2026 00:00:00 GMT An engineering case study about base-model licenses, fine-tuning data agreements, checkpoint provenance, and the licensing changes shipped in Obscura 0.1.1. Running Obscura on an NVIDIA GPU with Elixir, EXLA, and Lightning AI https://hfiguera.github.io/obscura/blog/running-obscura-on-nvidia-exla/ https://hfiguera.github.io/obscura/blog/running-obscura-on-nvidia-exla/ Fri, 24 Jul 2026 00:00:00 GMT A reproducible field report for validating Obscura, Nx, and EXLA on a Linux NVIDIA Tesla T4 without owning the hardware. Protecting PII in Elixir Before It Reaches Logs, APIs, and LLMs https://hfiguera.github.io/obscura/blog/protecting-pii-in-elixir/ https://hfiguera.github.io/obscura/blog/protecting-pii-in-elixir/ Wed, 22 Jul 2026 00:00:00 GMT A practical guide to detecting, redacting, and pseudonymizing PII at Elixir application boundaries with Obscura.