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Plan 9 - man page for securenet (plan9 section 8)

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SECURENET(8)									     SECURENET(8)

       securenet - Digital Pathways SecureNet Key remote authentication box

       The SecureNet box is used to authenticate connections to Plan 9 from a foreign system such
       as a Unix machine or plain terminal.  The box, which looks like a calculator, performs DES
       encryption  with a key held in its memory.  Another copy of the key is kept on the authen-
       tication server.  Each box is protected from unauthorized use by a four digit PIN.

       When the system requires SecureNet authentication, it prompts with a numerical  challenge.
       The  response  is  compared  to	one  generated	with the key stored on the authentication
       server.	Respond as follows:

       Turn on the box and enter your PIN at the EP prompt, followed by the  ENT  button.   Enter
       the  challenge  at Ed prompt, again followed ENT.  Then type to Plan 9 the response gener-
       ated by the box.  If you make a mistake at any time, reset the box by  pressing	ON.   The
       authentication  server  compares  the response generated by the box to one computed inter-
       nally.  If they match, the user is accepted.

       The box will lose its memory if given the wrong PIN five times in  succession  or  if  its
       batteries are removed.

       To reprogram it, type a 4 at the E0 prompt.

       At  the	E1  prompt,  enter  your  key, which consists of eight three-digit octal numbers.
       While you are entering these digits, the box displays a number ranging from 1 to 8 on  the
       left  side  of the display.  This number corresponds to the octal number you are entering,
       and changes when you enter the first digit of the next number.

       When you are done entering your key, press ENT twice.

       At the E2 prompt, enter a PIN for the box.

       After you confirm by retyping the PIN at the E3 prompt, you can use the box as normal.

       You can change the PIN using the following procedure.  First, turn on the  box  and  enter
       your  current PIN at the EP prompt.  Press ENT three times; this will return you to the EP
       prompt.	Enter your PIN again, followed by ENT; you should see a Ed prompt with a - on the
       right side of the display.  Enter a 0 and press ENT.  You should see the E2 prompt; follow
       the instructions above for entering a PIN.

       The SecureNet box performs the same encryption as the netcrypt routine  (see  encrypt(2)).
       The  entered challenge, a decimal number between 0 and 100000, is treated as a text string
       with trailing binary zero fill to 8 bytes.  These 8 bytes are encrypted with the DES algo-
       rithm.	The first four bytes are printed on the display as hexadecimal numbers.  However,
       when set up as described, the box does  not  print  hexadecimal	digits	greater  than  9.
       Instead,  it prints a 2 for an A, B, or C, and a 3 for a D, E, or F.  If a 5 rather than a
       4 is entered at the E0 print, the hexadecimal digits are  printed.   This  is  not  recom-
       mended, as letters are too easily confused with digits on the SecureNet display.

       encrypt(2), auth(2)
       Digital Pathways, Mountain View, California

       The  box  is  too  clumsy.  If carried in a pocket, it can turn itself on and wear out the

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