# Is there a reference to CKKS proxy re-encryption used in openFHE?

**URL:** <https://openfhe.discourse.group/t/is-there-a-reference-to-ckks-proxy-re-encryption-used-in-openfhe/930>\
**Category:** FHE Questions\
**Tags:** questions\
**Created:** [November 21, 2023, 2:52am UTC](https://openfhe.discourse.group/t/is-there-a-reference-to-ckks-proxy-re-encryption-used-in-openfhe/930 "2023-11-21T02:52:28Z")\
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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:** [March 26, 2025, 3:06pm UTC](https://openfhe.discourse.group/t/is-there-a-reference-to-ckks-proxy-re-encryption-used-in-openfhe/930/7 "2025-03-26T15:06:43Z")

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For CKKS, only the IND-CPA and FIXED\_NOISE\_HRA are supported. Achieving NOISE\_FLOODING\_HRA is harder because it would significantly increase the scaling factor.

The re-encryption key should not be made available to the party that knows the new secret key as this party can decrypt the message to find the prior secret key.

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