fhelium.core.context

Immutable CKKS context metadata.

CkksContextSpec

class View source

CkksContextSpec(logN: int, default_scale: float, q_moduli: tuple[int, ...], p_moduli: tuple[int, ...] = (), galois_generator: int = 3)

Device-placement-independent CKKS context description.

The context fixes $N=2^{\mathtt{logN}}$, $S=N/2$, the ordered ordinary primes used to form $Q_{\ell }$, the special-prime product $P$, the default encoding/planning scale ${\mathrm{\Delta }}_0$, and the Galois generator. It is metadata-only and independent of process rank, device ownership, or communication decisions. default_scale is not an invariant imposed on values: every plaintext and ciphertext carries its own actual scale $\mathrm{\Delta }(v)$.

Attributes

Name	Type	Default/value
representation	ClassVar[str]	'direct_per_value_scale_v1'
logN	int
default_scale	float
q_moduli	tuple[int, ...]
p_moduli	tuple[int, ...]	()
galois_generator	int	3

N

property

N: int

num_slots

property

num_slots: int

num_q_primes

property

num_q_primes: int

num_p_primes

property

num_p_primes: int

context_id

property

context_id: str

Stable SHA-256 identity of all mathematical context parameters.