Cryptographic Strength Evaluation of Key Schedule Algorithms

Table 1

Parameter values.

No	Tests	Property	Number of secret keys	Threshold level	Length of sequence (bits)
1	Frequency test	Balance of zero and one	10,000 random keys	α = 0.03	M
2	Bit-independence tests	Confusion and diffusion	10,000 random keys		(n  10,000)
	(i) Completeness
	(ii) Avalanche
	(iii) SAC
3	Bitwise-uncorrelation tests	Correlation among sub keys	500 random keys	α = 0.10
	(i) Frequency
	(ii) Runs
	(iii) Poker ()
	(iv) Autocorrelation (d = 2)
4	High/low-density key tests	Randomness of sub keys	8257 high/low-density keys	α = 0.01	M
	(i) Frequency
	(ii) Block frequency (M = 20)
	(iii) Runs
	(iv) Cusum