At 14:27 +0930 12/8/16, Sam Silvester wrote: >I believe the last digit of the 12 digits is a check digit (much like a >credit card number), which narrows the space further.
Do you base that belief on anything concrete? I've heard a few assumptions like that, which I agree has the effect you mention, but I haven't noticed any evidence to support it. (With a modest pool of pairs, that would be easy to test, particularly if it's a single-character check-character, and especially if it's a digit). -- Roger Clarke http://www.rogerclarke.com/ Xamax Consultancy Pty Ltd 78 Sidaway St, Chapman ACT 2611 AUSTRALIA Tel: +61 2 6288 6916 http://about.me/roger.clarke mailto:[email protected] http://www.xamax.com.au/ Visiting Professor in the Faculty of Law University of N.S.W. Visiting Professor in Computer Science Australian National University _______________________________________________ Link mailing list [email protected] http://mailman.anu.edu.au/mailman/listinfo/link
