Generate at-index (rotation) keys for a secret key — eval_at_index_key

Standalone wrapper around the CryptoContext::EvalAtIndexKeyGen(privateKey, indexList) C++ method. Functionally identical to eval_rotate_key_gen() (the C++ EvalRotateKeyGen is a thin inline wrapper around EvalAtIndexKeyGen) and both names are provided to mirror the C++ API.

Usage

eval_at_index_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.

Value

NULL, invisibly.