46
BOCA PRO16 Reference Guide
qThe modems will disconnect if:
• The secondary key, IV or KE mismatches (you will also receive a
message)
• An error corrected link cannot be established
• Wrong username and/or password is used. You will be given another
two changes to enter them before the modem disconnects
Example:
ATDT 456 4321
RINGING
RINGING
Enter name: MarkStein
Enter password: Fudge/Vanilla
Access granted
• ‘Fudge’ is Mark Stein’s password on the remote system
• ‘Vanilla’ is the password on the local modem
• ‘Access granted’ confirms that the passwords are correct
• Secondary keys mismatch if the secondary KEY, IV or KE are different
Enabling Rotating Secondary Keys
qIf you enter a KE of 00 for the user, then the secondary key will remain
the same for each connection.
qIf the KE is not 00 then this value is used as a seed to create a random
new secondary key for the user on each connection.
qAfter the initial connection is made with the KEY, IV and KE you have
entered, these values will change on both modems to new values
which are not accessible by any means.
qIf an event occurs that corrupts the KEY, IV or KE on either
modem, then both modems will have to be manually set back to a
known starting point.
FTo ensure random unknown keys, make two connections between the
secure modems after they have been initialized.
Security and Encryption
Security &
Encryption
pro16ref.pm6 6/14/96, 2:36 PM46
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