3.1. How effective is software at removing PII from free text?
It varies a great deal. We have evaluated software that does an excellent job of removing personally identifiable information (PII). We have also evaluated software that flagrantly failed to do so.
See this article for more information, including some reasons why NLP software may not perform as well in practice as it is assumed to perform in theory.
3.2. Can large language models leak personal information?
This has happened in practice. This article gives a hypothetical example of how this might happen.
