Thanks. Learning zero knowledge is on my to do list. I'm skeptical of differential privacy for patient medical records. I assume big data style deanon wins onc

Thanks. Learning zero knowledge is on my to do list. I'm skeptical of differential privacy for patient medical records. I assume big data style deanon wins once you can correlate with other data. Differential privacy is probably fine for "data dumps", like when study data is extracted from many patients. Since those dumps are not used for ongoing care, they can be more aggressively scrubbed. Total aside: Even encrypting data at rest is insufficient. Because even preserving chronological order (no timestamps) is sufficient for deanon. But last week I had a new notion for hiding time and order. I am a total crypto noob, so I'm still trying to figure out if this is a new idea. As a defender of patient and voter privacy, and so therefore a very vocal critic of electronic voting, I will be deeply chagrinned if I figure out how to make it work.