General purpose FHE is indeed quite slow. But by focusing on specific subproblems, like private information retrieval (get rows from a database without revealing anything about your queries), it is possible to achieve acceptable performance. There's been lots of recent improvement here: see papers [0] and [1] from this year, which both achieve GB/s throughput for private database lookups.
And for a more tangible demo of FHE, we built open-source webapps that let you privately browse Wikipedia [2] or look up live Bitcoin address balances [3]. This is FHE running in the browser today, returning results in seconds.
And for a more tangible demo of FHE, we built open-source webapps that let you privately browse Wikipedia [2] or look up live Bitcoin address balances [3]. This is FHE running in the browser today, returning results in seconds.
[0] https://eprint.iacr.org/2022/368 (disclaimer: this is our paper)
[1] https://eprint.iacr.org/2022/949
[2] https://spiralwiki.com
[3] https://btc.usespiral.com