.TH SECURENET 8.SH NAMEsecurenet \- Digital Pathways SecureNet Key remote authentication box.SH DESCRIPTIONThe.I SecureNetbox is used to authenticate connections to Plan 9 from a foreign systemsuch as aUnixmachine 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 PIN..PPWhen the system requires SecureNet authentication,it prompts with a numerical challenge.The response is compared to onegenerated with the key stored on the authentication server.Respond as follows:.PPTurn on the box and enter your PIN at the.B EPprompt,followed by the.B ENTbutton.Enter the challenge at.B Edprompt,again followed.BR ENT .Then type to Plan 9 the response generated by the box.If you make a mistake at any time, reset the boxby pressing.BR ON .The authentication server compares the response generated by the boxto one computed internally.  If they match, the user is accepted..PPThe box will lose its memory if given the wrong PINfive times in succession or if its batteries are removed..PPTo reprogram it, type a.B 4at the.B E0prompt..PPAt the.B E1prompt, 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..PPWhen you are done entering your key, press.B ENTtwice..PPAt the.B E2prompt, enter a PIN for the box..PPAfter you confirm by retyping the PIN at the.B E3prompt, you can use the box as normal..PPYou can change the PIN using the following procedure.First, turn on the box and enter your current PIN at the.B EPprompt.Press.B ENTthree times;this will return you to the.B EPprompt.Enter your PIN again, followed by.BR ENT ;you should see a.B Edprompt with a.B -on the right side of the display.Enter a.B 0and press.BR ENT .You should see the.B E2prompt; follow the instructions above for entering a PIN..PPThe.I SecureNetboxperforms the same encryption as the.B netcryptroutine(see.IR 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.B 5rather than a.B 4is entered at the.B E0print, the hexadecimal digits are printed.This is not recommended, as letters aretoo easily confused with digits on the.I SecureNetdisplay..SH "SEE ALSO".IR encrypt (2),.IR auth (2).brDigital Pathways, Mountain View, California.SH BUGSThe box is clumsy to use and too delicate.If carried in a pocket,it can turn itself on and wear out the batteries.