Table 7.

Scalability of the proposed protocol for different numbers of features (3 data providers).

Features, n	Size of ciphertexts, MB	Iterations, n	Training time (computation)	Training time (transfer)	Evaluation time (computation)	Evaluation time (transfer)
3	60.0	45	4 min 16 seconds	3 min 13 seconds	9 min 54 seconds	10 min 33 seconds
5	100.0	45	8 min 30 seconds	6 min 23 seconds	10 min 22 seconds	10 min 53 seconds
10	200.0	45	12 min 48 seconds	9 min 37 seconds	10 min 47 seconds	11 min 13 seconds
15	300.0	45	16 min 54 seconds	12 min 50 seconds	11 min 16 seconds	11 min 32 seconds
20	400.0	45	21 min 13 seconds	16 min 10 seconds	11 min 40 seconds	11 min 53 seconds