A.Read Internet RFC 1321, which describes the MD5 message digest algorithm. For a very challenging read, have a look at RFC 1521, which describes how both MD5 and DES feature in a particular...

For a very challenging read, have a look at RFC 1521, which describes

how both MD5 and DES feature in a particular authentication service: Kerberos.

However, note that this requires an understanding of various concepts discussed

later in the book.

B. Find out how high speed (9600 bits per second, or more) modems actually represent bit streams using a modulated analogue signal.