Efficient Two-Step Protocol and Its Discriminative Feature Selections in Secure Similar Document Detection

Table 1

Feature selection methods used for SSDD-FS.

Method	Description
SSDD-RP	Randomly select dimensions from an -dimensional vector.
SSDD-LF	Select highly frequent dimensions from Alice’s -dimensional current vector.
SSDD-GF	Select highly frequent dimensions from an -dimensional whole vector.
SSDD-HF	Select high-valued dimensions from the -dimensional difference vector between current and whole vectors.