securenet man page on Plan9

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       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	authentication
       server.	 Each  box  is protected from unauthorized use by a four digit

       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 generated 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
       internally.  If they match, the user is accepted.

       The  box will lose its memory if given the wrong PIN five times in suc‐
       cession 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  num‐
       ber  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 algorithm.  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 recommended,  as  let‐
       ters are too easily confused with digits on the SecureNet display.

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

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

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