An Efficient Video Encryption Algorithm Based on the Pseudorandom Number Generator of Zipf Distribution

Table 5

Comparisons of computational overhead increment.

Encryption schemes	Average overhead increment (%)
Scheme in [7]	3.1
Scheme in [11]	2.3
Scheme in [17]	1.2
Scheme in [20]	3.1
Scheme in [24]	2.5
The PSVE scheme	0.004