multi_eval_automorphism_key_gen: Generate a joint automorphism-key share for multi-party...
In openfhe.R: R Interface to the 'OpenFHE' Fully Homomorphic Encryption Library

multi_eval_automorphism_key_gen

R Documentation

Generate a joint automorphism-key share for multi-party rotation

Description

Produces this party's share of the joined automorphism eval key map for the supplied index_list. Each other party calls the same method with their own secret share, and the shares are combined via multi_add_eval_automorphism_keys() to produce the final joined map.

Usage

multi_eval_automorphism_key_gen(cc, sk, eval_key_map, index_list, key_tag = "")

Arguments

`cc`	A `CryptoContext` with the `MULTIPARTY` feature enabled.
`sk`	This party's `PrivateKey` share.
`eval_key_map`	An existing `EvalKeyMap` carrying the prior-party automorphism key state, obtained via `get_eval_automorphism_key_map()` after the lead party has populated the cc registry through `key_gen(cc, rotations = ...)`.
`index_list`	Integer vector of rotation indices.
`key_tag`	Character; optional tag to associate with the produced map. Default `""`.