# How to transfer the ckks of the threshold scheme to FHEW for ciphertext comparison

**URL:** <https://openfhe.discourse.group/t/how-to-transfer-the-ckks-of-the-threshold-scheme-to-fhew-for-ciphertext-comparison/741>\
**Category:** FHE Questions\
**Created:** [August 6, 2023, 1:59pm UTC](https://openfhe.discourse.group/t/how-to-transfer-the-ckks-of-the-threshold-scheme-to-fhew-for-ciphertext-comparison/741 "2023-08-06T13:59:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kenan](https://avatars.discourse-cdn.com/v4/letter/k/e495f1/32.png) [@kenan](https://openfhe.discourse.group/u/kenan)\
**Post date:** [August 6, 2023, 1:59pm UTC](https://openfhe.discourse.group/t/how-to-transfer-the-ckks-of-the-threshold-scheme-to-fhew-for-ciphertext-comparison/741/1 "2023-08-06T13:59:39Z")

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How to transfer the ckks of the threshold scheme to FHEW for ciphertext comparison

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**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:** [August 8, 2023, 2:56am UTC](https://openfhe.discourse.group/t/how-to-transfer-the-ckks-of-the-threshold-scheme-to-fhew-for-ciphertext-comparison/741/2 "2023-08-08T02:56:59Z")

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This feature is not currently supported by OpenFHE. We are planning to add threshold FHE support for scheme switching in a future version. Currently scheme switching between CKKS and FHEW/TFHE is restricted to the single-key case of CKKS.

In principle, this could be done by extending the switching key generation procedure (from CKKS to FHEW keys) to a distributed case.