InChIKey collision resistance: an experimental testing

Table 2 Selected normalized letter frequencies for various positions (1 to 14) in the InChIKey first block

Position	1	2	3	4	5	6	7	…	12	13	14
A	1.0000	0.9221	0.9130	0.9917	0.9213	0.9227	1.0039		0.9250	1.2273	0.9390
…	…	…	…	…	…	…	…	…	…	…	…
D	0.9898	0.9223	0.9182	1.0038	0.9138	0.9260	0.9938	…	0.9291	1.2321	0.9380
E	0.0000	0.9164	0.9331	0.0000	0.9208	0.9256	0.0000	…	0.9216	1.2249	0.9436
F	0.9986	0.9145	0.9200	0.9964	0.9183	0.9283	0.9957	…	0.9171	1.2313	0.9430
…	…	…	…	…	…	…	…	…	…	…	…
R	0.9965	0.9109	0.9279	1.0015	0.9207	0.9269	0.9916	…	0.9213	1.2152	0.9420
S	0.9940	0.9186	0.9294	0.9956	0.9184	0.9259	0.9957	…	0.9226	1.2236	0.8924
T	0.2395	0.9237	0.9303	0.2351	0.9227	0.9291	0.2297	…	0.9268	0.8413	0.9037
U	0.9992	0.9573	0.9341	0.9934	0.9543	0.9303	0.9906	…	0.9251	0.0000	0.8902
…	…	…	…	…	…	…		…	…	…	…
Z	0.9986	0.9627	0.9293	0.9969	0.9569	0.9288	0.9873	…	0.9316	0.0000	0.8857

Measured using InChIKeys for 998753 isomers of C₉H₈O₁; the values are normalized to the frequency of ‘A’.

ISSN: 1758-2946