Privacy-Preserving Vehicle Assignment in the Parking Space Sharing System

Table 2

Security and privacy comparison.

Attributes	PPMS+BABLL	Blockchain-based [28]	Campus parking [15]	IoT-UPM [7]
User identification	Yes, via CA	Partial	Partial	No
Destination of requestors	Yes	Partial	No	No
Parking duration of requestors	Partial	No	Partial	No
Cost function of requestors	N/A	N/A	Yes	N/A
Location of providers	Yes	Partial	No	No
Availability period of providers	Yes	Partial	No	No
Price of providers	Yes	Partial	N/A	No
Burst requests	Yes	No	Yes	No
Efficiency	Medium	Low	High	Medium