Deterministic hash of a plaintext's identifying parameters

Combines the plaintext's encoding type, scaling factor, noise scale degree, level, and slot count into a deterministic string representation. Two plaintexts with identical parameters produce identical strings; any parameter change produces a different string.

Usage

plaintext_params_hash(x)

Arguments

x

A Plaintext.

Value

Character scalar.

Details

Named plaintext_params_hash in design.md §10 as the fourth "harness unblocker" for the Signal 2 differential fixture for make_ckks_packed_plaintext. The fixture calls plaintext_params_hash() on a default and a perturbed plaintext and expects different strings when the perturbation reaches the C++ call site.

Not a cryptographic hash — equality comparison is the only guarantee. The returned string's format is implementation detail and may change without notice.