Implementations of multi-key FHE schemes

Library Questions
1

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
and
Asymtotically Faster Multi-Key Homomorphic Encryption from Homomorphic Gadget Decomposition.

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.

2

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 to learn more about the differences between threshold FHE and multikey FHE.

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