@Book{Schneier96:Book,
  Author = {Bruce Schneier},
  Title = {Applied Cryptography},
  Edition = 2,
  Year = 1996,
  Publisher = {John Wiley \& Sons},
  Address = {New York}}

@techreport{Dobbertin96,
  Author = {Hans Dobbertin},
  Title = {Cryptanalysis of {MD5} compress},
  Institution = {German Information Security Agency},
  Year = 1996}

@techreport{RFC821,
  Title = {A Simple Mail Transport Protocol, {RFC} 821},
  Author = {J. Postal},
  Year = 1982}