eval_rotate_key_gen: Generate rotation keys for a secret key
In openfhe.R: R Interface to the 'OpenFHE' Fully Homomorphic Encryption Library

eval_rotate_key_gen

R Documentation

Generate rotation keys for a secret key

Description

Standalone wrapper around the CryptoContext::EvalRotateKeyGen(privateKey, indexList) C++ method. Populates the CryptoContext's internal automorphism key registry for the supplied rotation indices so that eval_rotate() can consume them.

Usage

eval_rotate_key_gen(cc, sk, index_list)

Arguments

`cc`	A `CryptoContext`.
`sk`	A `PrivateKey` whose tag will be used to key the generated rotation keys in the cc's internal registry.
`index_list`	Integer vector of rotation indices.

Details

key_gen() folds this into its rotations = ... argument as a convenience for fresh keypairs. The standalone wrapper is the right entry point when the secret key already exists — for example as the lead-party rotation-key generation step in a multi-party rotation protocol, where subsequent parties contribute via multi_eval_at_index_key_gen().