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Generate relinearization (eval-mult) keys for a secret key

Source: R/eval-key-map.R
eval_mult_key_gen.Rd

Standalone wrapper around the CryptoContext::EvalMultKeyGen(privateKey) C++ method. Populates the CryptoContext's internal eval-mult registry (keyed by the secret key's tag) so that ciphertext × ciphertext multiplication can be relinearized.

Usage

eval_mult_key_gen(cc, sk)

Arguments

cc

A CryptoContext.

sk

A PrivateKey whose tag will be used to key the generated eval-mult key in the cc's internal registry.

Value

NULL, invisibly.

Details

key_gen() folds this into its eval_mult = TRUE branch as a convenience for fresh keypairs. The standalone wrapper is the right entry point when the secret key already exists — for example in any threshold or multi-party flow that holds a secret-key share but did not generate it through key_gen().