Efficient Searchable Symmetric Encryption Supporting Dynamic Multikeyword Ranked Search

Figure 6

Impact of m on the time cost of index building (a), trapdoor generation (b), search (c), and update (d) (n = 1000, d = 1000, b = 10000, and m = (12000; 14000; 16000; 18000; 20000)).

(a)

(b)

(c)

(d)