CCParams getters (all schemes)

Retrieve a parameter from a BFVParams, BGVParams, or CKKSParams object. Each getter wraps the corresponding upstream CCParams<T>::Get* method and returns its value unchanged.

Usage

get_ring_dim(params, ...)

get_plaintext_modulus(params, ...)

get_digit_size(params, ...)

get_composite_degree(params, ...)

get_scheme(params, ...)

get_standard_deviation(params, ...)

get_secret_key_dist(params, ...)

get_max_relin_sk_deg(params, ...)

get_pre_mode(params, ...)

get_multiparty_mode(params, ...)

get_execution_mode(params, ...)

get_decryption_noise_mode(params, ...)

get_noise_estimate(params, ...)

get_desired_precision(params, ...)

get_statistical_security(params, ...)

get_num_adversarial_queries(params, ...)

get_threshold_num_of_parties(params, ...)

get_key_switch_technique(params, ...)

get_scaling_technique(params, ...)

get_batch_size(params, ...)

get_first_mod_size(params, ...)

get_num_large_digits(params, ...)

get_multiplicative_depth(params, ...)

get_scaling_mod_size(params, ...)

get_security_level(params, ...)

get_eval_add_count(params, ...)

get_key_switch_count(params, ...)

get_encryption_technique(params, ...)

get_multiplication_technique(params, ...)

get_pre_num_hops(params, ...)

get_interactive_boot_compression_level(params, ...)

get_register_word_size(params, ...)

get_ckks_data_type(params, ...)

Arguments

params

A BFVParams, BGVParams, or CKKSParams.

...

Reserved for future method-specific arguments (currently unused — all getters take only params).

Value

The underlying parameter value. Types vary per getter.

Details

Several parameters are "disabled" on specific schemes (their setters throw at runtime). For a disabled scheme/parameter combination the getter returns the default value of the underlying field (typically 0L for uint32_t, 0 for double, or the enum's zero sentinel) rather than throwing. This is benign — the field was never set so its default is all the information available — but it means e.g. calling get_plaintext_modulus(params) on a CKKSParams object returns 0 rather than a meaningful modulus.

Functions

• get_ring_dim: Ring dimension n of the lattice the scheme operates over. For RLWE schemes this is the cyclotomic ring's degree n = phi(m) (Euler's totient of the cyclotomic order) and must be a power of two. The ring dimension is the load-bearing cryptographic parameter — security level and multiplicative depth together pin the minimum n, and most runtime costs scale as O(n log n) per homomorphic operation.

• get_plaintext_modulus: Plaintext modulus t for the BFV and BGV plaintext spaces. BFV/BGV plaintexts are elements of Z_t[x]/Phi_m(x) and every homomorphic operation is performed modulo t. On a CKKSParams object this returns the default field value (0) because CKKS does not use a plaintext modulus.

• get_digit_size: Digit size r for BV key-switching: the base-2^r digit decomposition of the ciphertext during a key-switch. Larger values decrease the number of digit multiplications at the cost of larger per-digit noise.

• get_composite_degree: Composite-scaling degree for the CKKS COMPOSITESCALINGAUTO/COMPOSITESCALINGMANUAL scaling techniques. Only meaningful when scaling_technique = ScalingTechnique$COMPOSITESCALING*; 0 under the default FLEXIBLEAUTO path.

• get_scheme: integer scheme identifier (see SchemeId for the enum values).

• get_standard_deviation: standard deviation of the Gaussian error distribution.

• get_secret_key_dist: secret-key distribution (see SecretKeyDist).

• get_max_relin_sk_deg: maximum relinearization secret-key degree.

• get_pre_mode: proxy re-encryption mode (see PREMode).

• get_multiparty_mode: multiparty mode (see MultipartyMode).

• get_execution_mode: execution mode (see ExecutionMode).

• get_decryption_noise_mode: decryption noise mode (see DecryptionNoiseMode).

• get_noise_estimate: noise-flooding noise estimate (double).

• get_desired_precision: noise-flooding target precision (double, bits).

• get_statistical_security: statistical security parameter. Return type is double per header inconsistency; see the Return-type note.

• get_num_adversarial_queries: upper bound on adversarial queries. Return type is double per header inconsistency; see the Return-type note.

• get_threshold_num_of_parties: threshold-FHE party count.

• get_key_switch_technique: key-switching technique (see KeySwitchTechnique).

• get_scaling_technique: scaling technique (see ScalingTechnique).

• get_batch_size: SIMD batch size.

• get_first_mod_size: bit size of the first (largest) prime in the CKKS modulus chain.

• get_num_large_digits: number of large digits for HYBRID key switching.

• get_multiplicative_depth: configured multiplicative depth. Note: this is the depth the context was constructed to support, not the current depth budget after operations.

• get_scaling_mod_size: bit size of each CKKS scaling modulus.

• get_security_level: target security level (see SecurityLevel).

• get_eval_add_count: BFV/BGV noise-flooding hint: maximum additions between multiplications.

• get_key_switch_count: BFV/BGV noise-flooding hint: maximum key-switch count.

• get_encryption_technique: BFV encryption technique (see EncryptionTechnique).

• get_multiplication_technique: BFV multiplication technique (see MultiplicationTechnique).

• get_pre_num_hops: PRE hop count.

• get_interactive_boot_compression_level: CKKS interactive bootstrap compression level (see CompressionLevel).

• get_register_word_size: register word size for multi-precision arithmetic.

• get_ckks_data_type: CKKS data type (see CKKSDataType).

Return-type note

get_statistical_security and get_num_adversarial_queries return double rather than integer. This matches an inconsistency in the upstream Params base class: the corresponding setters take uint32_t but the getters return double. The underlying field is a double — R binds per the header, not per the setter signature.

get_plaintext_modulus returns an R integer on 32-bit-safe values; for moduli that exceed the 32-bit signed integer range the return value is a numeric (double) carrying a losslessly rounded 53-bit integer.