mirror of
https://github.com/luxfi/lattice.git
synced 2026-09-24 00:25:44 +00:00
zeekay
eaf864890e
- Update module path to github.com/luxfi/lattice/v7 - Add GPU acceleration with Metal (macOS) and CUDA backends - Enhance threshold FHE operations - Revert to vanilla Apache 2.0 license (remove tfhe) - Update Go version to 1.25.5 - Merge upstream lattigo improvements
43 lines
1.8 KiB
Go
43 lines
1.8 KiB
Go
package mpbgv
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import (
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"github.com/luxfi/lattice/v7/core/rlwe"
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"github.com/luxfi/lattice/v7/multiparty"
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"github.com/luxfi/lattice/v7/ring"
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"github.com/luxfi/lattice/v7/schemes/bgv"
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)
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// RefreshProtocol is a struct storing the relevant parameters for the Refresh protocol.
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type RefreshProtocol struct {
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MaskedTransformProtocol
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}
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// NewRefreshProtocol creates a new Refresh protocol instance.
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func NewRefreshProtocol(params bgv.Parameters, noiseFlooding ring.DistributionParameters) (rfp RefreshProtocol, err error) {
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rfp = RefreshProtocol{}
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mt, err := NewMaskedTransformProtocol(params, params, noiseFlooding)
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rfp.MaskedTransformProtocol = mt
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return rfp, err
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}
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// AllocateShare allocates the shares of the PermuteProtocol
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func (rfp RefreshProtocol) AllocateShare(inputLevel, outputLevel int) multiparty.RefreshShare {
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return rfp.MaskedTransformProtocol.AllocateShare(inputLevel, outputLevel)
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}
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// GenShare generates a share for the Refresh protocol.
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// ct1 is degree 1 element of a rlwe.Ciphertext, i.e. rlwe.Ciphertext.Value[1].
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func (rfp RefreshProtocol) GenShare(sk *rlwe.SecretKey, ct *rlwe.Ciphertext, crp multiparty.KeySwitchCRP, shareOut *multiparty.RefreshShare) (err error) {
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return rfp.MaskedTransformProtocol.GenShare(sk, sk, ct, crp, nil, shareOut)
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}
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// AggregateShares aggregates two parties' shares in the Refresh protocol.
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func (rfp RefreshProtocol) AggregateShares(share1, share2 multiparty.RefreshShare, shareOut *multiparty.RefreshShare) (err error) {
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return rfp.MaskedTransformProtocol.AggregateShares(share1, share2, shareOut)
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}
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// Finalize applies Decrypt, Recode and Recrypt on the input ciphertext.
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func (rfp RefreshProtocol) Finalize(ctIn *rlwe.Ciphertext, crp multiparty.KeySwitchCRP, share multiparty.RefreshShare, opOut *rlwe.Ciphertext) (err error) {
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return rfp.MaskedTransformProtocol.Transform(ctIn, nil, crp, share, opOut)
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}
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