Hi everyone, im trying to use the EvalSum() operation on a vector with 4000+ values. Since this operation is based on several vector rotations, I have created rotation keys for all indices accordingly. The problem, however, is that the operation EvalRotateKeyGen() consumes so much memory that the p…

It is hard to comment on it w/o seeing a minimal working example. EvalSumKeyGen uses the batchSize parameter. If it is set to 0 (default), then all keys should be generated (for maximum number of slots). If it is set to a smaller number, then not all keys will be generated. Either way, it is hard t…

You should use EvalSumKeyGen, which generates a logarithmic number of rotation keys rather than one key for every index, or generate those keys yourself. EvalSum takes a logarithmic approach for efficiency reasons. Specifically, instead of computing ct2 = \sum_{i=0}^{n-1} Rot(ct, i), it performs ct…

Yeah i used this before but the error says: EvalKey for index [625] is not found. Somehow it does not use the EvalSumKeys. Can you tell me how to use EvalSum() correctly with the generated keys of EvalSumKeyGen()? auto evalSumKeys = cc->GetEvalSumKeyMap(kp.secretKey->GetKeyTag()); auto ct2 = cc->E…

Thanks! I didn’t know that EvalSumKeyGen uses the batchsize parameter. That solved my problem =)

EvalSum on a vector with 4000+ values

Library Questions

andreea.alexandru December 23, 2024, 7:34pm 5

Maybe this example here will help you Is there any example about how to use EvalSumRows/EvalSumCols? - #2 by Caesar.

Topic		Replies	Views
Is there any example about how to use EvalSumRows/EvalSumCols? Library Questions openfhe-help	9	878	November 9, 2023
Error in EvalSumCols “Input second evaluation key map is empty” Library Questions bugs , questions , openfhe-help	4	206	May 2, 2024
ThresholdFHE Generation of EvalSumKeys using the OpenFHE Python Wrapper OpenFHE ports/wrappers	2	135	May 18, 2024
Error in EvalSumRows "Input evaluation key map is empty" OpenFHE ports/wrappers	7	237	April 16, 2024
EvalPoly, EvalSumCols, EvalSumRows only works for CKKS OpenFHE ports/wrappers	2	127	November 19, 2024

EvalSum on a vector with 4000+ values

Related topics