A New Guess-and-Determine Method for Cryptanalysis of the GSM Encryption

Table 2

Statistical results for the successful attacks based on the experimental analysis (η_tsc: mean of total state candidates; η_csc: mean of complete state candidates).

Number of rounds	ηtsc	ηcsc	(ηtsc/ηcsc) ∗ 1000 (%)
10	2^28.21	2^24.12	5.87
11	2^29.50	2^26.45	12.07
12	2^30.30	2^28	20.30
13	2^31.80	2^30.20	32.98
14	2^32.12	2^31.45	62.85
15	2^33	2^32.95	96.60