Encrypted Speech Retrieval Scheme Based on Multiuser Searchable Encryption in Cloud Storage

Table 4

The evaluation comparison of retrieval performance.

Scheme		Multiuser	Security	P (%)	R (%)	F1 (%)	Retrieval time (s)
Ref. [31]	Scheme-A	Diffie–Hellman	Adaptively	94.00	93.00	93.50	0.139
	Scheme-B		Adaptively	83.00	84.00	83.50	0.134
Ref. [34]	Scheme-I	−	CPA	92.00	93.00	92.50	0.150
	Scheme-II		CPA	93.00	92.00	92.50	0.120
Our scheme	MFCC	CP-ABE	IND-CPA	100	100	100	0.269
	Spectrogram		IND-CPA	74.97	92.03	82.63	0.274