Yeah, often companies will make that kind of claim based on the fact they only pass around sha256 hashes of email addresses, which are trivially deanonymized.

Yeah, often companies will make that kind of claim based on the fact they only pass around sha256 hashes of email addresses, which are trivially deanonymized. https://freedom-to-tinker.com/2018/04/09/four-cents-to-deanonymize-companies-reverse-hashed-email-addresses/ https://freedom-to-tinker.com/2018/04/09/four-cents-to-deano...