# Implementations of multi-key FHE schemes **URL:** \ **Category:** Library Questions\ **Created:** [April 9, 2024, 6:43am UTC](https://openfhe.discourse.group/t/implementations-of-multi-key-fhe-schemes/1179 "2024-04-09T06:43:25Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![oksuman](https://avatars.discourse-cdn.com/v4/letter/o/6de8d8/32.png) [@oksuman](https://openfhe.discourse.group/u/oksuman)\ **Post date:** [April 9, 2024, 6:43am UTC](https://openfhe.discourse.group/t/implementations-of-multi-key-fhe-schemes/1179/1 "2024-04-09T06:43:25Z")
Hello. I’m seeking the implementation of the multi-key CKKS scheme as introduced in [Efficient Multi-Key Homomorphic Encryption with Packed Ciphertexts with Application to Oblivious Neural Network Inference](https://eprint.iacr.org/2019/524.pdf) and [Asymtotically Faster Multi-Key Homomorphic Encryption from Homomorphic Gadget Decomposition](https://eprint.iacr.org/2022/347.pdf). In the OpenFHE library, can I utilize such implementations, including the multi-key variant of relinearization and automorphism? If not, do you have any plans to provide a multi-key FHE scheme? (Only thing i can find was the implementation in Golang) Thank you for reading. ---
**Author:** ![ypolyakov](https://yyz1.discourse-cdn.com/flex031/user_avatar/openfhe.discourse.group/ypolyakov/32/47_2.png) [@ypolyakov](https://openfhe.discourse.group/u/ypolyakov)\ **Post date:** [April 10, 2024, 2:04am UTC](https://openfhe.discourse.group/t/implementations-of-multi-key-fhe-schemes/1179/2 "2024-04-10T02:04:20Z")
We currently support only the threshold multiparty FHE setting as it is more efficient for many applications. The multikey approach is typically less efficient (although there are some recent works proposing a hybrid solution). I suggest watching [Homomorphic Encryption for OpenFHE Users – OpenFHE.org](https://www.openfhe.org/portfolio-item/homomorphic-encryption-for-palisade-users-5/) to learn more about the differences between threshold FHE and multikey FHE.