Rick,
you are going to have to be far more specific:
Depends on what you mean by Secure:
Once a connection is broken, the 2 systems have to re-establish a
connection, and then re-establish the security mode.
Then there are many possibilities:
If the message set is encrypted with a 1 time encryption, then the new
connection will (presumably) be using a new key,
so to 'continue' the message (file) the 2 halves of the message will have to
be defined within the receiving system, and decrypted with their own
individual keys
If the security is a simple substitution type, based on the connecters ID,
then the parts of the message will have the same key and the message can be
treated as 1 file
If the encryption is reasonably secure, then the code substitutions will be
rolling, thus the entire file will have to be resent, or the 2? parts
decoded individually and then joined together
--------------
Then what do you mean by Protect
Consider a file on a PC is as secure as the PC
If I can get at the PC, I can delete the message
(Mains voltage across the drive case will probably go a fair way towards
that)
I believe you can answer the question by taking the process in steps
1) message created
2) message entered (typed?) into to PC
etc.....
//
PC calls home
Home says
I don't talk to callers - disconnect
Home decides perhaps that callers request needed to be addressed
( They said ____ and that's in my list of people who can leave messages -
it's got a phone number and a set of keys
there is a code with that message I'll call them back and see if they
respond with the second part of that key
Then they better give me something that decodes with the 1st 4 parts of the
key
If Ok - then home records the message
Now does home change the keys to be used, or is it so poorly managed that
the same keyset is used repeatedly
Yes - the phone line may provide that security imbedded within a modem, or
router, or the line may be 'hard wired'
but that still leaves the message open to recording, and - if the key does
not change then, given enough data, current PC's should be easily capable of
decoding the messages
JimB
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