DanielIvanCorti Posted November 21, 2016 Share Posted November 21, 2016 (edited) Hi all, I need to operate on a random (long) string of bits, contained in a binary file, produced by an hardware random number generator. I have to do a "whitening" with the very simple Von Neumann algorithm: take the first two bits if they are equal, discard them if they are 1 and 0, output 1 if they are 0 and 1, output 0 take next two bits This process eliminates bias from the string, making it ideal for cryptography purposes. I succeded at this but in a very poor way, reading binary data (displayed as hex), translating it to an INT number and then manually to 1's an 0's AND BACK. It's extremely slow. Do you know any more elegant way to do this? Ideal would be "to talk" in 1 and 0 from the start.. Thank you in advance, Daniel Edited November 21, 2016 by DanielIvanCorti Link to comment Share on other sites More sharing options...
jchd Posted November 21, 2016 Share Posted November 21, 2016 The only efficient way I can see is by inlining a handfull of ASM to do that really fast. There are many examples of inline machine code in the examples forum. This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
DanielIvanCorti Posted November 22, 2016 Author Share Posted November 22, 2016 Umh, I'm so noob at this and I don't know assembly.. where to start? Some advice? Thank you Link to comment Share on other sites More sharing options...
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