Speech Encryption Algorithm Based on Nonorthogonal Quantum State with Hyperchaotic Keystreams

Table 5

Quality metrics comparison of encryption scheme with other methods.

Method	Key length	keyspace		NPCR	UACI
AES	128,192,256		0.009700	99.60327	33.4218
Ref [22]	>264	>	0.00022	99.6399	33.8085
Ref [23]	744		0.00121	99.6317	33.6781
Ref [26]	>		0.00321	99.6317	33.6782
[pro:meth]	>		0.000136	99.6320	33.6823