Table 4 Comparisons of storage overhead

RS-HABE

\(|{\mathbb {G}}_T|\)+(1+3\(n_a\)+\(\frac{1}{2}n_p\))\(|{\mathbb {G}}|\)

(3+(2+\(n_p\))\(n_u\))\(|{\mathbb {G}}|\)

(3+\(n_p\))\(|{\mathbb {G}}|\)

RS-CPABE-ASP

\(|{\mathbb {G}}_T|\)+(3+5\(n_a\)+\(n_p\))\(|{\mathbb {G}}|\)

(1+3\(n_u\))\(|{\mathbb {G}}|\)

2\(|{\mathbb {G}}|\)

RABE-DI

2\(|{\mathbb {G}}_T|\)+(2+4\(n_a\))\(|{\mathbb {G}}|\)

(2+\(n_u\))\(|{\mathbb {G}}|\)

N/A

CC-ABE

\(|{\mathbb {G}}_T|\)+(2+4\(n_a\)+2\(n_{cop}\))\(|{\mathbb {G}}|\)

(2+2\(n_u\))\(|{\mathbb {G}}|\)

N/A

Ours

\(|{\mathbb {G}}_T|\)+(1+4\(n_a\)+\(n_{cop}\))\(|{\mathbb {G}}|\)

(1+2\(n_u\))\(|{\mathbb {G}}|\)

2\(|{\mathbb {G}}|\)