Homomorphic multiplication without relinearization

Returns the raw product of two ciphertexts as a higher-degree ciphertext (the result has n1 + n2 - 1 polynomial components where the inputs had n1 and n2). The standard eval_mult() automatically relinearizes the result back to 2 components; this variant skips the relinearization step so that multiple multiplications can be chained at higher polynomial degree before a single relinearize() call at the end. Used by the EvalMultAndRelinearize fused variant and by EvalPolyWithPrecomp for noise-optimal polynomial evaluation.

Usage

eval_mult_no_relin(x, ...)

Arguments

x

A Ciphertext.

...

Method-specific arguments: y — a Ciphertext to multiply x by without relinearization.

Value

A Ciphertext at higher polynomial degree.