# Frequently Asked Questions about FHE

DevFeed: [Frequently Asked Questions about FHE](<https://devfeed.tech/articles/frequently-asked-questions-about-fhe-40499.md>)

Original publisher: [Read original article](<https://www.jeremykun.com/frequently-asked-questions-about-fhe/>)

Published: 2025-07-18T17:31:49Z

Content type: article

Language: en

Sources: [Jeremy Kun](<https://devfeed.tech/sources/jeremy-kun.md>)

Topics: [homomorphic encryption](<https://devfeed.tech/topics/homomorphic-encryption.md>), [FHE](<https://devfeed.tech/topics/fhe.md>), [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [math](<https://devfeed.tech/topics/math.md>), [GPU](<https://devfeed.tech/topics/gpu.md>), [Facial recognition](<https://devfeed.tech/topics/facial-recognition.md>), [Sorting](<https://devfeed.tech/topics/sorting.md>)

Tags: [cryptography](<https://devfeed.tech/tags/cryptography.md>), [encryption](<https://devfeed.tech/tags/encryption.md>), [facial-recognition](<https://devfeed.tech/tags/facial-recognition.md>), [fhe](<https://devfeed.tech/tags/fhe.md>), [gpu](<https://devfeed.tech/tags/gpu.md>), [homomorphic-encryption](<https://devfeed.tech/tags/homomorphic-encryption.md>), [mathematics](<https://devfeed.tech/tags/mathematics.md>), [programming](<https://devfeed.tech/tags/programming.md>)

## AI overview

A collection of short answers about fully homomorphic encryption (FHE), covering encrypted queries, computation on ciphertexts, sorting, performance, and security against quantum computers. The article explains that FHE can support operations on encrypted data without exposing the underlying plaintext, while computational overhead remains a key limitation.

## Source excerpt

I work on homomorphic encryption (HE or FHE for "fully" homomorphic encryption) and I have written a lot about it on this blog (see the relevant tag). This article is a collection of short answers to questions I see on various threads and news aggregators discussing FHE. Facts If a service uses FHE and can respond to encrypted queries, can't the service see your query? How is it possible to operate on encrypted data without seeing it?