Table 2.

Summary of the security parameters for the algorithms to run under $\lambda =128$-bit security level. Security implementation is based on the Microsoft SEAL library. N is the polynomial ring size, $\text{log}Q$ is the coefficient modulus size, $\mathrm{\Delta }$ is the scaling factor, and L is the multiplicative depth of the HE algorithm

Method	N	$\text{log}Q$	$\text{log}\mathrm{\Delta }$	L3
“Unsupervised method” section	$2^{13}$	218 / 188	30	4 / 3
“Clustering-based supervised method” section	$2^{12}$	109	29	1
“Linear regression method” section	$2^{12}$	109	29	1

³L refers to the multiplicative depth of the algorithm and determines the size of $\text{log}Q$. The symbol / indicates another parameterization where L and $\text{log}Q$ are different