Secure digital communications for EmComm

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					Secure digital communications for EmComm
                  (part 1)

               Brad Low-K5BDL
             Cherokee County ARC
                August 2, 2007
    Purpose of tonight’s presentation
 Provide a brief overview of systems we
  can use in the field
 Discuss a plan for next several months to
  describe each system in detail
 Chat with you about what we can do as an
  ARES team
          Why it is needed
 Consider a scenario that a disaster has
  occurred in our area and all e-mail and
  Internet communication has been affected
 Secure communications for EOCs
  containing patient data and other sensitive
  communications may be needed and we
  can provide this service
             What can we do?

   Today’s technology allows us to quickly deploy into
    an affected area with our computers and radios
    and set up a communications link.
   The agency we serve and the traffic they need to
    move will dictate what mode(s) we will use to
   Winlink 2000 packet e-mail system
   High Speed Multimedia (HSMM)
   Soundcard Packet (SV2AGW packet engine) and
    other soundcard modes (FAX, PSK, etc.)
   D-STAR
                 Winlink 2000
   Winlink 2000 is a system (rather than a specific
    software program) that connects packet stations
    to the Internet. *Think Echolink for digipeaters
    and packet stations. Can be accessed by the
    following ways:
   TelPac (TELnet PACket bridge); VHF/UHF
   Paclink AGW with Paclink Post Office; VHF/UHF
   Airmail (mainly for HF Pactor)
   More information at
For HSMM, you need only at least two computers to connect in
  ad hoc network mode. Once connected, you can use e-mail
  through your e-mail program (Outlook) or communicate via
  a client program such as Microsoft NetMeeting (digital data
  and VoIP).
         Soundcard Packet

 Employs SV2AGW Packet Engine
 Useful when TNC (such as a PK232) is not
              Soundcard modes
   Relatively easy way to get on the air on short notice
   Software is free and widely available
   All digital modes can be run on HF and also VHF/UHF
   Drawback: could be monitored by someone who has
    software and a scanner/shortwave radio. In other
    words, perhaps not very secure
   TWISTER (encoding)
 Probablyis the most costly option
 Operates in the 1.2 GHz band

 Simultaneous voice and data transfer
   I invite all of you to consider taking part in
    experimenting with these modes and we can
    learn together how to effectively provide
    emergency communications to our served
    agencies in the area
   Starting next month: discuss the various modes
    in detail (one mode per month)
   September 2007: Winlink 2000
   Information regarding digital projects can be
    found at
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