Serious private set intersection uses full homomorphic encryption or equivalent mechanisms. Microsoft Edge's compromised password detection uses FHE, for instan

Serious private set intersection uses full homomorphic encryption or equivalent mechanisms. Microsoft Edge's compromised password detection uses FHE, for instance: https://www.microsoft.com/en-us/research/blog/password-monitor-safeguarding-passwords-in-microsoft-edge/ https://www.microsoft.com/en-us/research/blog/password-monit... If anything, this article understates the problem. A single Nvidia RTX4090 can calculate 164 billion MD5 hashes per second running hashcat software: https://gist.github.com/Chick3nman/32e662a5bb63bc4f51b847bb422222fd https://gist.github.com/Chick3nman/32e662a5bb63bc4f51b847bb4... That said, surprisingly few people are aware of this fact, even senior technical leadership at Big Tech companies, so I'm not surprised dodgy Ad-Tech companies are not either, and it might be an illustration of Hanlon's Razor: do not ascribe to malice what can be better explained by incompetence (even if ad-tech companies long ago forfeited the benefit of doubt).