:: MD5 ::
MD5 is a procedure to calculate a checksum. This checksum is generated from
one fix string (on both ends known) and a string random generated from BBS.
BBS knows password "GEHEIM" and generates the random string "10359". The
user terminal (or S&F partner BBS software) knows also the password "GEHEIM"
and calculates from received string "10359" a md2 checksum from "GEHEIM10359".
The result "5f4...9S" is sent back to BBS. At BBS the same calculation has be
done. If the results are the same, the user password was ok.