MD5-Hashs are used for global error checking of MPC files.  It
is also used to identify identically source files.  A MD5-Hash
is a cryptographic one way hash which generates a 128 bit hash
from a list of blocks with 512 bits. It should be from the
computational effort impossible to generate an articifial file
from a given MD5 hash.  Method of computation is defined in RFC
1321. Computation speed is similar to the well known but very
weak CRC-32.   [eMail]      [Addr]