For all that the author doesn’t like exotic crypto, this seems like the sort of problem that the sort of fancy cryptography that the Ethereum folks love would a

For all that the author doesn’t like exotic crypto, this seems like the sort of problem that the sort of fancy cryptography that the Ethereum folks love would actually be appropriate for. The goals are, approximately: 1. There exists a log, and the log follows certain rules, and everyone agrees on a summary of the log from which log entries can be validated and from which the fact that the log follows the rules can be validated. 2. One can validate a record without retrieving the whole log. 3. Appends can be done, and new summaries generated, without access to some of the entries. Cryptocurrency, as far as I know, does not care about #3, whereas this project does. But maybe similar sorts of exotic crypto could generate a stronger form of shredding: a scheme where deleted PII only persists in the form of a constant or logarithmic size ever changing summary. It’s a bit hard to argue that, say, 10kb of data contains PII from a million users.