Customizable Encryption Algorithms to Manage Data Assets Based on Blockchain Technology in Smart City

Table 1

Data query time of different methods.

Nodes	Origin	Merkle -B Tree	Skip list	Mix
2	2	4	3	5
4	3.9	5.2	3.5	4.5
6	4.9	6.5	5.2	6
8	5.2	7	6	6.3